Limit customer for session

Good morning,
I just activated the plugin. I am testing the free version before purchasing PRO.

There are only these 2 problems:

1) My clients per session must be 25 or above.
The system gives me the ability to select only up to 20, not beyond. How do I solve? It is indispensable for me.

2) I would like to set the possibility of booking only within the next 24h, blocking the possibility of seeing the following days. I tried to set the end interval in 1 day but the choice of dates goes haywire and freezes.
To solve, I had to set the interval for 1 week …
I would like to point out that I have many services which are only available at certain times of the day. Perhaps this is what makes him “block”.

My urgency is to first solve point 1.

I kindly await you.
Regards,
Francesco Barbato

The page I need help with: [log in to see the link]