Hi Cam,

Are the checks you are importing for vendors on file, or cash invoices for miscellanous vendors? This could be important, as your company runs with multicurrency enabled, and if you are importing for misc vendors then the import may not know what currency to assign to the payment, since that comes from the vendor (control account set).

To allow 'once detail per entry', the option for 'Header fields on each record' must be selecting. This is a more 'Excel-oriented' layout where the Header and Detail lines are on the same row, as opposed to the Header line on one row and the Detail row on the next line.