Floors Climbed

Since around the beginning of February, my daily Floors Climbed dramatically shot up.  I understand there is a slight margin of error and typically I get credit for less than 5 random flights of stairs per day.  But now, I am getting over 30+ floors climbed and descended every day.  One day I had over 60 floors climbed.  I have not changed my daily activities, so I'm not sure what's going on.  I have rebooted my watch a few times, but that doesn't seem to change anything.  Any suggestions?  Thank you.