I've always been told that the 1+ you see just before heading into the lift was because of a toon up bug. It sometimes shows your team mates one point short of their full laff, but then as you head to the lift, it sometimes corrects itself. Before I knew this I would try to heal my fellow players again but only ended up wasting the tune up as they were in reality, full health.
As far as the task bar being green, like Dandyboing said: it's because someone just before you completed the task on that same line and theirs turned green...so subsequently, everyone elses similar task line will be green also, even if theirs isn't completed.
For example.
Toon A is Dancing and completed his 2nd. task, it turns green.
Toon B is Dancing and did NOT complete his second task, but it also turns green.
