I've found that happens almost normally. Always have to keep in mind that it may be a computer monitoring a fire, it is still a fire. If the auger happens to have a bit more pellets jammed in a small space and dumps a bit more in it'll climb, or if the temp drops a bit lower it'll up the auger speed to recoup the temp loss and will overshoot it every time. It'll depend on ambient temps a lot or how often the lid is opened. If its fluctuating lots all the time, id say its cause for concern. But it if happens occasionally and sorts itself out, dont worry about it!
