User Activity

I can only assume this is a site issue. I use the eBay app on iPad, not the latest, the one right before. I made a purchase today, and when I went to pay for it, the shipping cost, which was there when I hit "Buy It Now," became "Local Pick-Up Only."...
Just wondering. If I use the "Best Offer" option and I receive an offer, can someone else "Buy It Now" while the offer is still active? Or do I have to decline the offer before anyone else can buy? Thanks.
Okay, I sold a number of items (7) to a single buyer. Buyer has now contacted me and wants to cancel two of the items off the list. I have no problem with that. I already have the cancel cases logged and am waiting for the buyer to agree. Problem is,...