I Let the stove burn out today while I was at work and cleaned out the ashes. Then I was going to vacuum the fly ash off the cat when I noticed some of the center cells have some minor deformation.
What do you guys think? 
and a close up on the worst spot. 
 
I've been running it low and the cat needle is often passed max when cooking reloads but settles into 3/4 range after a hour or so.
Im thinking it's from manufacturer but Ive never looked at the cat before operating the stove so I have nothing to compare it to. 
I got the stove brand new in September I hope I didn't over fire the cat