Excessive Cat temps in Buck 91

Hi guys and gals,
I am having trouble (?) with extreme temps of 1700 to pegged out @ 2000 when I put 3 splits in the stove. My wood is dry oak and apparently have a real good draft. I usually ran 1200 to 1400 in the Dutchwest I can shut the stove down to 1/8th and less and still get these readings. I dozed off in the recliner last night and when I woke up it was pegged out the the air @ 1/8th, I promptly opened the damper to cool it down. I love the heat it puts out but am worried about the Fire Cat catalyst being damaged. I could probably stuff 8 or 9 sticks in it and no telling what it would do. You guys that have Buck stoves what are your readings?

I really enjoy this forum with all the info and am probably on the verge of being addicted....lol. I leave it opened up on my browser all the time.

thanks
David

Thanks, I will try running it @ 1/4 and see if that helps. I do have a history of trying to run a fire to low....trying to squeeze all I can out of the wood.
Sort of like trying to starve a profit out of heard of cows.

The only flames was the kind of whispy, ghost like one you get with the cat.

I thought that it probably had some secondary air but it is a new stove and I have not had time to investigate good yet.
I would like to see an exploded print on the stove.