Created Kits moving themselves to Goalkeeper Kits

Hi, I'm managing in Serie A and so have been changing some kits over for the new season - when removing Monza's kits, and adding the new ones all appears well, but when saving everything and closing FMRTE and restarting FM, the kits aren't showing - instead I'm getting the default plain navy home kit and white away (the game's placeholders for when the kits section is empty).

Upon going back into FMRTE, all the kits i've added have moved themselves over to the goalie section, leaving the outfield kits blank.

This has happened with several teams now, Palermo, Napoli etc - sometimes all three kits, sometimes just one or two.

Going back into FMRTE and re-adding changes nothing - all appears fine, but then going back into the game the kits have all moved into the GK section again.

Most teams have edited fine, it should be noted, whether I have removed all the kits first or just edited the existing ones.

Happy to give any required information I haven't already included.