Maybe some of them got replaced by the ones in Aug 22 MMP. Quite possibly they have the same name? When you pasted in the markings, did you check for what you were replacing? I guess you could delete all of the files in your textures that are from the packs (hope you have a FH Backup, or it will take a long time to go through them individually) and re-copy-paste them into the folder. I'm just taking a guess at what it might be, and what sounds the most reasonable, as I haven't done something like this in a long time. Re-installing the markings and/or mods usually is what works for me.
