<blockquote>You're probably using exp from zero, i.e. each level up restarts from 0, so exp actually can be reduced here :)</blockquote>
Ooooh I didn't realize it was an option (but of course, there's an option for everything in Ork :)
I just turned it off and it works as intended now. I think I'll keep it this way.
<blockquote>For this, you can limit the Change Schematic to only execute for positive changes via it's Value Change Check settings, e.g. checking for Is Greater than a value of 0.</blockquote>
Yeah, I tried that before my original post, but instead of showing a negative number, it just showed nothing, so it was kinda weird for the player who wasn't receiving any feedback.
Thank you for your time :)