Well, as mentioned in the remark in KIS: We just kept the appointments of KIS as initial choices, but then were asking the registered students for their preferences since we do not make use of the allocated (physical) rooms. That lead now to other appointments that were sent to the registered students. We now have Tuesday, Wednesday and Thursday two sessions. We plan to keep now the discussed and determined appointments for the rest of the semester.
Note that you could, in general, log into anyone of the other sessions in case you should have missed yours for some unforeseen reason. However, we really advise all students to respect the made assignments unless there are good reasons why another session is exceptionally attended in a week. The reason for this is that we want to make sure that the bandwidth of the video conferencing tool will be sufficient. So, help us to make this work fine for you.