Apple

I don't know if this is a matter of calibration or if I have a faulty watch. I recently purchased an SE2 and I find my activity rings filling up even when I'm not actually achieving them. Specifically, it's the Move ring and the Stand ring. I could be working all day sitting in my chair and by the end of it I've apparently hit 100-150 calories of movement? Also, I'm not sure what Stand is supposed to track... I suppose I probably have stood up 7-10 times over the duration of the day to grab some water... is that what it's tracking? I've had situations come up where I get the notification to stand up, and about 10 seconds later (without my standing) it would say "Complete!" and fill up the ring...

If it's a calibration issue, how do I recalibrate? Or could this be a lemon and I should bring it back to Apple? Thanks!