Simultaneous printing ensures perfect alignment of the data with the form.
Each method has advantages and disadvantages compared to the others. However, it was not possible to test all combinations, and in a few cases the form produced will not be a good representation of the preprinted form. Often the problem can be fixed by checking to see that the printer settings are what the program's instruction file said they should be. Alignment should be similar to the preprinted form, with no significant misalignments. It makes the text block too short.