Hi, sorry for the late response.
The "problem" at first was a mere oversight on my part, that the green buttons actually indicated that all weeks were active, not only the one I pressed. The default setting fooled me before I got the picture
What I do not like is the new JEvents Dashboard. I still think the old one gave a better overview and an easier access to new events than the new one. All the present info on the dashboard page is hardly used, what I need is quick access to making new events, and a quick over present events, not mere numbers.
But, I guess this will be individual. I have also found, as I have more sites where JEvents is used, that the Return To Joomla button at the bottom of the vertical left hand menu actually makes the entire menu flicker, and it does not function properly. I did a re-install on two sites and the issue was solved.