question

Updated firmware last week on MPPT 75/10 smart controller.

1. Now if I change from the Trend screen to Status or History, the 2 parameters I am tracking disappear. Nothing is tracked until I re-select the 2 parameters, BV,BAmp. Firmware problem?
2. There are times I wish to turn off the solar panel and the power feeds to the controller. Does the order in which I turn the panel and power switches on or off matter? Don't want to damage the controller.
3. My max power P max history over 2 summers is only 80-88W on sunny days, end of June. The new panel is mounted horizontally. I'm at 43 degrees latitude. The panel is rated 100W- shouldn't the P max be closer to 100W?

Thanks