Here is my dilemma,

My Cameras(35mm) have pressure plates with holes cut out for date imprinting,which I don't have anyway.With any lens in my possession at their
widest angle and with an 89b filter and above the negatives and print get a ghost image from the cut-out.Obviosly this is a result of the nanometer cut off from the filter(#29 and #25 red do not cause this)and in an attempt to rectify the situation I've placed aluminium foil with electrical tape on the back of the camera,to no avail.Short of buying new cameras(not an option at the moment)or new pressure plates is there any other option.Other than that there has been no other issues with regards to infrared film.

Thank you to anyone who can help.
Jim