pretty much anything other than steam that can cause a game overlay would be your first thing to check.
that includes but isnt limited to:
game recording software;
chat software like discord or skype;
opengl filters like QEffects.
this post is not useful to anyone without the name of server and the name of the person. Yes most servers are crybaby honor followers, go play a diff server
cant you work off of model scaling with JKA? would that help you reach proportions? Because if you're doing wookiee aren't they like 1.5 scale length of normal skeltons