Thanks. You're talking about the Rescue Soldiers mission, right? Not the Extract VIP mission?
It's a bug that the Cleaners are attacking civilians on that mission, I'll get that fixed now. We recently added it as setting we can enable / disable on any mission we like so it's a 2 minute change.
Beyond that, most of these problems seem to be based around the idea that this should be a Extraction mission, but it's not - we've already got those, and they're a slightly different thing. Really this is an elimination mission where you bring a reduced team and your units start split across the map, and where you can grab your soldiers and retreat if you want.
I can see that it might be worth adding the threat of enemy reinforcements if you take too long, but that does complicate the victory conditions a bit if so.