Different times - how Oruxmaps recognice no movement / continue tracks

I have a questions to the time. Start and stop time is clear to me. But how it calculates the time that is shown in statistics close to the distance?
What happens if I make a rest. Does it stops counting up the time? What is the criteria for that. It is adjustable and how?

As I don't know how to exclude times for rest, I stop recodering. The problem is, if I do other things with my phone during thís rest, I didn't get the question of "continue track". This is rather bad, as I don't know how to combine later this two or more tracks into one again. So: Is there any way to force continue a track. I can imagine someone will continue it even after a next day...

Normally if you have stopped a track, you can continue it by starting again. See http://nedmartin.org/public/oruxmaps-continue-track.html for some screenshots.

That's right, but not under all conditions. I assume, it doesn't work after a close or if the app has been removed out of RAM because Android needs it temp for other apps (like browser ...).
It would be great to ALWAYS have the choice to continue the track.

And what is about the moving time (not sure I translated it right - use the german version)? How does Oruxmaps distinguish between time of movement and a rest? And how this is adjustable?

Thanks