$50 should be low enough.
How old are the accounts? Maybe you should let the funds stay in the account for a while.
I experienced the same when I tried to move too much or too fast.
I'm looking for a good ebook that explains paypal tricks the easy way.
They are all relatively new. Some I have been sending small transfers in or small ppmc and letting it sit. So over the past three weeks I've manged to slowly add up to several k between the accounts. I am thinking I should have learned a bit more before dumping that much into them
If they are new I think your best bet is to let them asleep for a while.
Login regularly and maybe send small amounts regularly (I'm guessing with this one. It just seems logical to me)
I'm also in the process of learning how paypal really works after they screwed me more than once.
I just wish people would ditch pp entirely and just use some much better alternatives that already exist like skrill (if you need to use credit card) or just cryptos.
But as that's not possible in the short term I believe I'll have to learn all paypal tricks.