Ok, i fixed the saving problem. For some reason i had another MUP.ros file which i didn't make, but i was not editing the correct one.
As for Tigers bug, i have not changed the teams.csv, but it may have become changed at some stage perhaps, but not by me.
Maybe if i can get the file again it will fix it.
What is really odd, is that in the game now, if i press a certain button on my gamepad while the match intro animation is playing, it will crash.
If i don't press it and leave it, it works as normal. So i guess i will watch the intros more, which is probably a good thing.
This editor is really good, apart from that i can't get the faces to load, but i disabled it so i dont get the error now.
All the changes appear in the game, i just have a problem with Tigers, so for the moment i can't seem to edit their line-up, but i can edit all the players individually.