Certain presets not appearing in lightroom

Hello everyone,

I recently got Jamie Windsor's film preset pack... I used the normal way of importing them like i do for all my lightroom presets and only part of the presets appear, ofcourse the ones i need the most dont... They are all XMP files, i also already reinstalled lightroom, reimported the presets but nothing seems to help.

Anyone here that might know what the reason could be, al my other preset packs seem to work fine!

Thank you !