There are some errors in the above. I might be best to wait for official sources. If you are a regular line holder going into a reserve month and a regular trips conflicts with X days you are paid back those X days. You don't lose them. Normally they are moved to when your regular trips gets back. You must request however that they get moved. No idea why.
* days are for trip assignment only. They can't give you a trip that flies into those days. Once you are on the road they can reroute you into those days any time they want. They can even reroute you into vacations days.