If you record something as a billable expense and you change your mind and change it to something else, lets say, to an expense account or to an inventory item, then the expense remains in the billable expense tab and not moving to the proper account
I created a Billable expense on a purchase invoice. It appears in Billable expenses as “Uninvoiced”
I edit the purchase invoice and changed the account to an expense account. It now appears under the expense account and is no longer listed in Billable Expenses
What version of manager are you using? If it is not the latest, I suggest you download and install the latest version and have another try
What happens, when you change a line item previously posted to Billable expenses > Customer to an inventory item, is that the subsidiary ledger for Customer is not cleared. In fact, if you change the account back to Billable expenses, the customer’s name is already there.
An example of this would be purchasing an item you thought would be billed directly to a customer rather than placed into your own inventory. Then, for whatever reason, you decide to put it into inventory and sell it from there.
I’m putting this into the bugs category.
Note: I have not tested this, but similar things may happen elsewhere in the program where subsidiary ledgers are involved.