Only two weeks?! Great work!
The Clementi, though it is an etude, a study, has other elements besides the finger-work. You really forged through it like Patton at the battle of the bulge. But the gradus ad parnassum is more then just finger excercises. Believe it or not, there's music there. It's going to be difficult at this point, however. Because when you've approached a piece in this way, the music gets pushed further and further into the background as you daily hammer your way through it.
I would say the same for the 3rd prelude. The left hand is wonderful, finger-wise. You've really worked out the technical difficulties. And it's one of the nastiest (technically speaking) of the preludes. A friend of mine heard a rather famous pianist once who just left it out!! But this prelude is a jewel. I love it. I hear the spring wind or a bubbling brook in the left hand. And you're so preoccupied with that fiendish difficulty, you just pound out the right hand.
The first prelude is a bit slow. Here, again, you've got to work out the coloring. I think it was Arrau who said he heard an orgasmic breathing in the first prelude! at any rate, you do have to breathe with that anxious motif in the r.h.
And, yes, the piano should be tuned. But I find we sort of get used to our own piano and don't hear it when it slowly stars to slip out of tune. How many times I went for lessons in the houses of some noted pianists, and found THEIR piano awfully out of tune!