[poizan42]

Most likely those 5 transactions never actually existed. I'm saying this because it's a well-known problem that accounts sometimes gets flagged and you are requested to provide information about an transaction that never actually happened, I have encountered this myself (as a buyer). It lists a transaction number they want more information about, but you have never actually made any transactions at that time, and if you click on it you get a page that tells you that transaction doesn't exists.

Most likely there is a race condition somewhere in PayPal's backend that results in a transaction being partially logged to the wrong account, and then the inconsistent data makes the fraud detection system flag it.