[Supersetoy]

How large were the deposits? (If you don't mind me asking).

I've worked for a few banks growing up, and the US has a "10K" rule. If a deposit is made over 10K, the bank has to check where the deposit is coming from, clear the check...etc. Usually this takes a week to clear. I've seen some pretty ticked off customers with this policy in place...but I'd guarantee no one on this site has read through a full rules and regulations disclosure for their bank.

More than likely within that little pamphlet there's something that states: "The bank, at any time, for any reason, may hold your funds for an extended period of time".