Throwing this out here because just had my third customer with this issue, so I'm starting to wonder about it's cause. Anyway, the TOTAL on a sales order or purchase order is double what the lines add up to be. The issue is the Tax Schedule for the Customer/Vendor - if you go to Tax Schedule maintenance, there are 2 lines on the tax schedule, one of which has been DEFAULT in 2 cases. In one case this had been setup this way for a while and did NOT cause issues on 4.3 but did on 4.4. In other cases, client was originally installed on 4.5. I'm assuming client is setting these up incorrectly, but odd that 3 of them had this issue all so close together.