missing deadline on shipping...

[reallyretrovintage23]

Over the weekend a person purchased an item.  She paid for that item and paid $22 shipping.   About an hour later, she made an offer on a second item and I accepted.  I messaged her that I'd invoice her once I had the package packed up and that I'd combine shipping.   

The second package made the shipping go up by $1.  I invoiced her for the second item with $1 shipping and waited....

Sometime during the night, she messaged me that if I lower shipping she "MIGHT" pay for the second item.   

I have 24 hour shipping.   I am going to miss my window.  She is 3 hours time difference than me and not the greatest at responding to messages.  

What would you do?   How big of a ding is it to miss a shipping window for customer convenience?  

What do I do if she waits until I ship only the first item and then pays the invoice with $1 shipping?  

[buyselljack2016]

As other stated......................  one late is not going to hurt you, but seriously ..........$1...................... 

Seller invoicing for another $1 shipping?

Buyer grousing about another  $1 for combined shipping?

I am at a loss to understand buyer, or seller logic at this point.

[simply-the-best-for-you]

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@reallynicestamps wrote:

The 24 hour shipping is 24 hours from payment isn't it? Not from purchase.

I find it difficult to understand how a buyer has time to send a Message saying they are going to pay, instead of just paying.

Paypal backed with a credit card. Done.

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Yes, but she did pay for the first one.  The 2nd item is in offer stage.   First item needs to get shipped or take a small hit, like I said, it's a generous threshold.  But for future OP, when I do stuff like that, *I* give them the deadline.  For example:  If you purchase 2nd item by {time and date}, I will combine.  Otherwise, your {item name here} will be shipped tomorrow.   Thank you for your purchase, blah blah blah.