From user:
-I actually closed the synced account with the institution.
-I went to remove the synced account and "Stop syncing and keep data in a new manually-managed account"
-I believe during the flow it warned me that all the transactions and historical balances would be moved over to the manual account--which is what I would expect.
-The transactions and current month's balance showed up under a manual account, but previous months' balances stayed under a "ghost" deleted account. (Bug #1?)
-Not liking the clutter, I manually moved the historical balances from the deleted account to the new manual account.
-Everything works as expected and the account drops off... until I refresh Lunch Money and the deleted account reappears. (Bug #2?)