Interesting...I must not have been paying attention because I hadn't noticed that you do not get your DOffs back at the end of a "reinforce" mission. I thought they were just gone for the duration of the mission, could have sworn I'd seen some of them end up in the sickbay after the mission completes but hadn't realised I was loosing any of them.
Do we actually get anything informing us we've lost a DOff on a mission ever? I don't recall seeing such a notice.
I really must pay more attention to where my DOffs go...
I thought the execute and re-assign to SFA missions were fairly self explanatory but can see how they might not be as clear as they could be about their effect.