Hey there! Yep, the metal will warp into its final resting place over time. This is completely expected and normal. This is one of the reasons we have a "seasoning" step in the instructions, to allow the metal to warp into its final resting place. If you believe your stove is warped extensively and is impacting performance, then please send us a note and we'll look into it :)
contact@sweattent.com
Cheers