LIPOs naturally "breath" during charge and discharge. (This is not the dreaded swelling)
Those batteries may have had rough handling. By all means though, return them if you don't want to use them. I have 3 GiFi batteries, no problems. Tell you what: ordering something fragile that ships from Amazon, call it a gift, even though it's coming to you. No extra charge, and they will put it inside another box.