Post to GL - Wrong Accounts showing up

We have tuition (and some other fees) set up to post to specific GL accounts based on grade level in their GL Distribution settings.

When trying to use Post to GL, the accounts showing up for payments are consistently either the default AR summary or Cash accounts accounts set from Settings > Transaction Rules > Default Accounts, instead of the ones we've set in.

We can't see anything wrong with our tuition/fee setup, but I haven't seen anyone post about experiencing this issue. We can't use Post to GL at all because of this. Support hasn't been able to help. Any ideas?

#posttoGL