the monthly event at top doesnt show each iteration in the main events calendar (probably same as one of the comments, it will disappear for the current month after the date and appear for the next one).
and the monthly recurring “list” and “date” events below only works weekly (this is way for DaWGs it works).
So for 1. I would say it’s not ideal if that’s the “expected” behaviour, I would expect to see all the recurring events like any other calendar application, and for 2. it seems it’s simply broken.