Scanning Mission - Completed or Not?

Hi there,
after not having used DD for quite a while I have been scanning landscape features recently intensively.
I recall that when a mission was completed it looked differently then what I see now:

The screenshot shows the mission was stopped before the calculated time and I don’t konw what the incomplete yellow ring is telling me.
Upon landing though it says mission completed, asking me to upload the files.
And: It was calculated that 223 images are to be taken, at the end I had 230.

The scans worked and looked fine - I just don’t understand the time difference between calculated and real mission time and the incomplete yellow ring…

Thank you for your help!