I'm also in contact with a colleague of you if I'm right, on the proForum about this: http://eventsmanagerpro.com/support/questions/sorted-categories/#comment-54539
I hope you can read it.
Yes indeed, I can't dynamically set the category ID, but your colleague send me this:
[events_list_grouped category="54" scope="future" mode="monthly"]
[events_list_grouped category="38" scope="future" mode="monthly"]
If you're wondering where I putted this code: settings > formatting > event categories > Single category page format
Normally this should do the trick, but when I do this, I got all my events sorted on both pages and after all my sorted events, I get out of nowhere 4 double events that aren't sorted. Normally I only got 8 events in total, but I've got 12 on each page now.
So my goal is still the same:
I've got 2 pages, on each page I have 1 categorie (called categoryID 54 and 38). My categoryID 54 should have 3 events sorted monthly and my categoryID 38 should have 5 events sorted monthly.
I hope this explains it