I have had several instances where I enter a Journal Entry for a Bank Account and make sure the box is checked to post to the Sub-ledger and it doesn't work. I've even had instances where I make a transfer journal entry in the General Ledger and it only posts to one of the Bank sub ledgers and not both banks in the journal entry. If the box is checked to post to the sub-ledger when making an entry to a bank account it should ALWAYS post to the sub-ledger. This is an error that should be remedied immediately.
If you have are still having issues getting these Journal Entries to show in the Bank register or they are failing to show, please contact our customer support so we can investigate it further and figure out why this is happening. Apologies for the inconvenience and hopefully we can get to the bottom of this!
I assume the sub-ledger you are referring to is the cash management bank register. When you do your journal entry and the box is marked that you are referring to, the entry should show up in the appropriate bank register if it is configured properly. You can check this by going to the appropriate bank register and clicking on Edit Account Details.