Your DD is doing much more work than my idle DS, flatmouse. He does virtually nothing at the weekend. Maybe it's a girl/boy thing? All of my friends with sons are feeling the same way as me at the moment, we'd like to put a rocket under them to get them moving. Or just to wake them up. Whereas the girls I've heard about do seem, on the whole, to take their responsibilities more seriously and have a sensible approach to revising/exams. Hard to generalise, though.
I'm trying to remember what we were told at our Year 11 meeting - something like 1 hour's revision each day during Year 11 = 1 grade higher in the GCSE result - I'm happy to be corrected, though. Going by this for now, it does sound like your DD might be doing about the right amount of revision at the moment, adding on her weekend work too. There are so many conflicting opinions online, though! It's a minefield.
UCAS Progress. The best way I can describe it is that it's a website designed especially for students (FE/HE/Post Grad), where they can go to find information about careers and courses etc, search for providers offering the courses which interest them, create their own profile including a personal statement, and then use this to apply - via the website - for any courses they've found (so long as the providers themselves are registered with UCAS Progress). They do need their own account first though.
I think it's meant to take some of the leg work out of the application process; and be a central source of information for anyone who isn't quite sure what they want to do next, or who knows, but isn't sure how to get there. DS sort of knows the direction he wants to take already so he hasn't used it to search for careers, but it's been useful in helping him to find 6th form colleges within a certain distance from home that offer the A-levels he's after. He's saved his preferred colleges to his Favourites so that once he's finished his profile and personal statement, he can just go to Applications and start sending them off with all his details included. I don't know if the system in use everywhere at the moment, we're in Kent and a lot of places appear to be using it already here.