JerseyJJ Customs Question

It’s my first time ordering from jerseyjj33 based on recommendations and posts from this subreddit. I live in the U.S. and wanted to ask: what are the odds of customs seizing my packages? I recently ordered 2 jerseys, and they’re currently at JFK customs. If I receive them and the quality is good, my friends and I are considering doing a group order of around 12 to 15 jerseys. Is that too many, and would it get flagged by customs?

TL;DR: First time ordering from jerseyjj33. Two jerseys are at JFK customs. What are the odds they get seized? Also, would a future group buy of 12 to 15 jerseys get flagged for being too big?