Hi- having a couple of issues, some help pls!

Problem #1:

Withdrew my BBP from Southxchange to one of my BBP addresses in Biblepay core, but nothing is showing up whatsoever in my wallet! Not even in pending. Southxchange is showing tx confirmed. Checked and double-checked the address for any typos.

To pay the fee, did I have to have existing BBP in that receiving address? Because I just assumed it would be taken out of the BBP transaction itself..

Problem #2:

Logged into my biblepay pool2 account to check my worker status, it is saying CPID_SIGNATURE_INVALID. What the heck is that??

Many thanks!