When I set the dim from 10% to 100% from the main screen, why does the Individual bulbs screen sometime show a value different than 100% if I manually refresh the screen?

When you manually adjust dim from 10% to 100%, it actually triggers a series of dim values updates to be sent to the server in ascending order. The server updates the current dim values as those updates come in one by one. So, if you refresh the individual bulb screen before this gradual update is completed, you may see values between 10% and 100%. If you wait a little bit before refreshing the screen, the bulbs will show and stay at 100%.