IIRC 13th floor ran for quite a while in Eagle after the merge. Can't fully remember how long for or how much of what has already been printed covers it.
I believe there's about 145 episodes of The Thirteenth Floor. A lot are 3 pages long but still an astonishing, sustained weekly page turn-out for Ortiz – and there's plenty of crazier storylnes yet to be reprinted.
Yes, the whole "Mystery of the Gents' Boutique" storyline, and the introduction of Mini-Max...

My page count in the database I have here for Eagle puts the page count for Thirteenth Floor at around 400 pages, though I think there's a chunk of 50 or 60 pages already reprinted in the Rebellion edition. Still, I reckon there's enough there for another pair of 170-180-page collections before the whole lot is reprinted, so perhaps the volume this year and one next October would see the whole tale done.
I don't think any of the stories were ever named, but going through my database I seem to have named all of them, which might give an idea of how bonkers it gets:
The Thirteenth Floor (concluding the tale from Scream!)
The Cat Burglar
Farewell, Bert Runch...
Nightmare Leak
The Test
Switched Off!
Grand Reopening
The Mystery of the Gents' Boutique
The Recruits
Special Shoes
The Wrath of Auberon
The Cobra (introduces Mini-Max)
Computer Fatigue
The Caretaker
Teaching the Trotters
The Rabbit Robber
Max Fu
To Russia with Max
Mad Max
The Bad Bikers
Big Joe
The Hot-Rod Granny
Punishing the Piggetts
The Beadles
Max-Mania