I know nothing about PayPal. But it seems to me that if there was a significant amount deducted from your account it should state exactly what it was for - i.e. $xxx for a purchase from Amazon.com.

Another thing - if I'm reading your post correctly - you give PayPal access to your bank account? They can deduct anytime they want?

I allow only my medical insurance to be deducted directly from our bank account - and that is done by the University where I once worked. Absolutely no one else has auto pay privileges. I pay our bills from our bank account when I want to do it - not when they want.

If I were you, I would immediately change my bank account and don't give the info to anyone - or I would cancel PayPal's ability to access your account. The more that can get in there, the less safe it is.