A SA told me that sizing inconsistency is because they size off of the piece theyre influenced by. Like if theyre copying a WW2 vest thats a size large but fits more like an XL that will be reflected amongst the reproduction
Could be an excuse, either way annoying
Thats kind of messed up. My lining is bunching up at the bottom but hasnt created that under lip yet. The only silver lining to your situation is that you paid sale price (if you paid what i paid then it was a crazy deal).