Just tried to measure shutdown and hard-off times - it never comes exactly, for example:
1. If the "D" pins are connected then it should be like: 10 mins for shutdown and 1 hour for hardoff, when I got little more then 10 minutes (something like 10' 30") and hard off came in 1 hour and ~7 minutes.
2. If the "C" pins are connected then it should be like 30 secs for shutdown but it gave me 31-33 secs.
Is it normal?
Yes, that is normal. The default firmware uses very approximate "ticks" for timing functions. If you need more precise timing, check out my custom firmware thread. I just put the firmware up for sale today :)