@JoshuaParsley1984  As far as JEs go, it's fairly straightforward.

If a bill was actually paid out of Bank A but shows as coming out of Bank B, then the problem is simply with the bank balances.

So, you debit Bank B for the problem amount (to raise its balance back up) and credit Bank A for the problem amount (to lower its balance to what it should be).

If QBO has it, a transfer function would be a better option; QB is a bit weird at times with sourcing JEs for reports.

Either way, both of these actions will leave Bank A with a deduction to use for its reconciliation and Bank B with an entry that will offset the erroneous deduction back to 0, allowing Bank B to be reconciled.