This problem has nothing to do with IoS or Android. To make sure, I turned off my phone so no apps would be involved. On my PC I logged into my Outlook account on Edge, and then opened Outlook 2016 in Windows 10 and created a new Appointment for about an
hour from now. It shows correctly on Outlook 2016, but as soon as the appointment popped up online in Outlook Calendar, after less than a second it was converted into a Meeting where, as has been mentioned in previous posts, as Organizer I invited myself.
This a BIG BUG!!
I only hope Microsoft will eventually be able to recreate my calendar correctly, because there are a whole bunch of past appointments that are now meetings and cannot be edited.