Print Line Position

 I have 2 checks out of 10 checks the checks are printing in either too high or too low position.

The 1^st the check position is too high, and in the middle there are another check the check position is too low.

 I thought is due to some of them does not have full address lines or less detail lines in the stub but it is not true.   There are another one has the same number address line and same detail lines printed ok.

 Please let me know if you have this similar problem before and know how to fix it.

Thanks to share your expertise.