So it sounds like your trouble comes from how overpaid invoices are now handled, as described in this release note: [17.9.28] Improvements to automatic credit allocations. You should be able to fix things by simply deleting invoice selections. Manager will then distribute funds based on oldest unpaid due date, just as it did before. The only difference is that overpayments are now marked as such, with the overpayment remaining associated with the invoice, instead of rolling forward. But if the “rolling-forward” behavior worked for you, you can still take advantage of it by deleting those invoice numbers. That may be a simpler recovery method. And you can still modify your workflow going forward, if you want.