Can I bind an every tick function to just one command?

I am currently working on an exp system for my rpg and i seem to have an issue with my EXP updating every tick. Every time my character finishes a job its supposed to add 1 to the exp of said job. but when i talk to the npc that is supposed to show me how much i need to level up, it starts infinately adding +1 to my characters exp every tick. At the moment i have the every tick function bound to just my HUD event sheet. I have the "include HUD sheet" in the store sheet. Im not sure where i went wrong. if someone needs to look at the project i wouldnt mid showing them it but im particularly weary of passing out copies of my game.

I'd not update EXP every tick. I'd only update EXP when it actually needs to be updated aka when you gained some exp (via a function perhaps). It's hard to tell what's going on in your project, some screenshots of events in question would help already if you don't want to share your project.