Your site settings show you are NOT passing discounts to buyers, so they should be getting charged FedEx (and UPS and USPS) retail counter rates.
Your last screenshot shows that the residential surcharge is being added to the list rate based online label charge as expected, so that isn't an issue (not that I expected it to be), and for FedEx, residential surcharge isn't an issue for retail rates anyway - it is already rolled into the higher counter rates along with the Fuel surcharge (effectively, FedEx counter/retail rates are a fixed price Home Delivery price - delivery to a commercial address isn't any less)
Looking the base rate of $14.62 up in the FedEx Service Guide list rates table shows that that amount is for 12 pounds (the eBay online dimensional weight based on using a 166 DW divisor) to zone 6.
According to the USPS online tool,
77406 to 85365 is zone 5
77406 to 07470 is zone 6
77406 to 14127 is zone 6
but this is a rare borderline case where there is a subtle difference between USPS zones and FedEx zones, and it turns out that the FedEx zone charts show that 77406 to 85365 is also zone 6.
(note to all: keep this in mind when blindly using USPS zone charts for FedEx calculations as I do - it works 99% of the time, but there can be differences. You can obtain the FedEx zone charts via ftp from the FedEx site: ftp.fedex.com/pub/us/rates/downloads/documents2/95600-95899.pdf etc are there in that directory in pdf, txt, or csv formats. They are old from 2015 but what the current online FedEx tools point to)
So, the base rate we see in that label details does correspond to a zone 6 shipment and reality. The $16.17 amount shown on the label flow screenshots is the correct eBay discounted online amount for that package (ships at 12lb eBay dim weight) to zone 6.
Let's look at the $16.02 the buyer paid. It should have been $26.41 (looked up using the eBay estimating calculator http://www.ebay.com/shp/Calculator in "in-store rates" mode)
$26.41 is the FedEx Retail amount for a 15lb package to zone 6. (15 pounds because retail rates are not calculated based on the nicer eBay 166 online rate divisor, but instead use the standard FedEx 139 dim weight divisor: 15x13x10/139 = 14.03 = 15lb
We cross check that amount in the 2018 FedEx Counter Rate tables, and it matches. $26.41 IS the correct charge to the buyer for a 15x13x10 package to zone 6 when you are NOT passing your online discounts on.
The buyer was charged $16.02, which is the online discounted rate (the 15¢ difference is a typical discrepancy between the label calc and the estimating/listing/checkout calc -and I don't know why. Always a few cents diff and usually in buyers favor)
I couldn't find the 3 sold and shipped you mentioned (were they on the ID you are posting with here?), and can't tell much from your active listings but I did see one: The Dept 56 Halloween thing that appears to be 4 lb from your description and the shipping rates I see, and probably not too huge (dim weight not a significant factor?).
The USPS Priority Mail Price is correctly being shown as retail, the UPS price is also correctly retail, and it looks like the FedEx rate shown is also the correct retail rate.
Without seeing the actual listing (or the listing shipping and payment tab shipping rates) for either one of the sold ones that was wrong, or a current listing that is affected, I can't be sure, but I think an old bug has resurfaced or was never fixed.
There were issues a while back where something similar to this was happening. The site setting for "pass shipping discounts to buyers" was being ignored for some listings with FedEx shipping for some sellers (I think it may have been more widespread, but most sellers were oblivious and/or didn't report it here in the forums), but in the opposite way.
There were instances where the site setting set to pass discounts to buyers was being ignored in some cases, and buyers were charged the higher retail rates (and were furious because they had been shown the correct lower discounted shipping amounts in search and the listings). There were also happenings where the setting was ignored, and was showing the incorrect higher retail rate in search and the listings (which can scare buyers off before they even click into the listing to look). Unknown if that bug was actually charging the higher retail rate at checkout.
Your issue is the opposite (sort of), and I can't recall if it also happened (forum search sucks, and I just don't recall all the permutations of bugs for the various FedEx Services over time).
In your case, you want to show buyers the higher retail rate in search and the listings, and charge them that higher retail rate, but what seems to be happening is that the listings appear* to be showing the correct retail rate, but the discounted rate is being charged at checkout.
*again, I can't tell what exactly is going on because I can't see the original listings with the problem or find any current live listings where I can see a pattern.
Either post an item number for one (or more) of the 3 where the buyer was undercharged (or PM it to me), and/or see if one of your active listings seems like a candidate to fail the same way. That way we can see if it is only at checkout that the site setting is being ignored, or if it is also in search and the listing shipping amounts shown to buyers.
That info will help to define the problem, and reveal a path for testing. If it is only at checkout, I can't test because nothing of mine is selling, odds of the one or two FedEx shipping items I have selling is low, and I pass discounts to buyers anyway, If also search and/or listing shipping amounts are affected, than I and others can play with it to see.
As far as fixes? Once the problem is defined we can notify eBay and they can proceed to not fix it.
It may be similar to a previous (Smartpost bug) where the glitch is "stuck" in your listings and has to be
"exorcised" by toggling the site setting, revising the listings (any revision to shipping like adding a handling fee just to change something), toggling the setting back, revising again,etc to purge the demons, or as in my case, ending the listings and starting over from scratch (I only had two affected in that similar but different bug a while back).
https://community.ebay.com/t5/Technical-Issues/Search-results-show-inaccurate-amp-HIGH-calculated-sh...
