When entering a PM Voucher, sometimes the PAY type distribution to the A/P account will be double the amount of the voucher. This happens if you have Analytical Accounting (AA) installed and it is listed before AIT in the DYNAMICS.SET file. When AA comes before AIT, both AA and AIT update the PAY distribution. When reversed, only AIT updates the PAY distribution. Change the order of the products in the DYNAMICS.SET file to resolve the problem.