Exercise/Move Ring Glitch

So today I was working out and tracking it like i always do since i got my Series 3 watch last christmas, but today something weird happened. When I left the gym my move ring was at like 65% and it says I burned close to 450 calories. Now, a few hours later, I look down and my watch says I've burned 300 and I'm at 40%. When I scroll down my workout has still been recorded and it says I burned 355 active calories. My question is why did the move ring shrink to a smaller number than the exercise I have recorded??? Please help!! I've searched and hard rebooted both my phone and watch, also tried manually adding another workout in the health app!!