HELP I am trying to combine shipping with no luck.

[oldschoolantiqueauto]

I am a seller trying to combine shipping for 3 auctions one buyer purchased & has already paid full shipping on all three auctions. I want to combine the shipping but I can't find a place to do it so eBay knows I shipped all three together? I could just pick the first auction & ship all three in one box, than refund the buyer the difference he paid for the other two. But the other two won't have shipping protection because it won't show they were shipped? I click the box next to all three listings but I don't see any options once I click the box's. Can some one explain what to do?

[aprilmoviebuf2000]

On the awaiting shipping page, click the boxes next to the 3 items, then click on the Shipping drop down above it.  You will see the 3 on the bulk labels page.  Click on the boxes next to the 3 again, and click combine order.  This way they will all get the same tracking number added.  
Note, I only do this on my laptop, not sure how to do it on the app if that's what you are using.  
If you want to refund some of the shipping cost, it's also an option in the shipping tab, click reason refund postage.  

[baydistributionllc]

April is right but…

When I combine items like that it adds the word “Returns” to the end of my return address. Not sure why my return address changes when I combine like that. If it didn’t combine for me I ship both items under one and then add tracking to the second one just so it doesn’t put the word “returns” on my label.