Fixed in v.66 
Bug
That’s correct, since the theme was composed for the 120th anniversary
Because 2119 was the 120th anniversary, as the text says.
I can’t find a difference.
The mission name is displayed there. I can’t change that.
That would be more confusing, since (as you pointed out) the times displayed don’t update in real-time.
Correct. It will either be fixed in v.66 or one of the upcoming versions.