thanks for the replies. I am aware that it is just one minute per hour even if I am standing for the whole hour, and that also I need to move around. After dealing with tech support, I had to turn off stand reminders in the apple watch app on my phone, and turn it back on. Worked fine after that - until today morning, where I had to do the same thing.
If the problem happens again tomorrow, there is probably something wrong with my watch. It's an easy fix, but not something I want to deal with everyday. I end up checking every hour now, if I get credit, and that's not a good use of my time.