Past webinar dates showing on the registration page

Hi community, 

we are running webinars Mo-Friday multiple times a day (during different times). These are currently set up as recurring weekly webinars, and all the dates are added manually every day. 

Nevertheless on our booking page old dates are still available to book. We don’t want to loose the data from these sessions so removing these seems not an option. Additionally, a time at 1pm comes automatically to the schedule even though it is not time we offer. How do we setup the booking page so that – only dates in the future are visible (preferably to block 60 minutes before webinar starts), not have to add all occurencies manually, and not having this 1pm sessions plop up randomly? 

Also, why doesn’t the booking page show day of week, and webinar duration? Can this be changed? 

Thank you in advance.