Here is the real issue imo-
Your "friend" the manager, may possibly be exposing everything you told him about MS with Serve the minute you leave.
I mention this because at a certain bank where I thought everything was cool- wasn't, as I caught the "friendly" teller in the managers office < 45 seconds after I walked out to my car and returned for something else.
These employees are only interested in 1 thing and that is retaining their job by not omitting any suspicious or untoward activity. They are not your friend.
edit
Issue in question was >$10k deposit (by check) no MS ever discussed.