Which paragraph wasn't? I've read Dan O's theory of how Guede danced on air to the bathroom, selectively cleaned himself with erratic traces, and then dashed out of the cottage leaving footprints incompatible with locking the door.
It never made sense, was always fantasist conspiracy theory, and Mach effectively debunked all its central points. But I'm sure you and the 15 other people here will disagree. So it goes.
Huh?
There's a perfectly reasonable and plausible chronological narrative to explain the shoe/foot print evidence with Guede as the sole attacker. It's been outlined here many times before, but perhaps you've missed it (accidentally or willfully?):
1. Guede stabs Kercher in the neck.
2. Guede gets Kercher's blood on his trouser leg (and arms).
3. Guede walks to the small bathroom wearing his trainers, which (as of now) have no blood on their soles (and thus he deposits no bloody shoe prints).
4. Guede removes one or both shoes in order to step into the shower and wash the blood off his trousers with the shower wand.
5. Guede places his bare foot into the blood/water mixture that has pooled in the shower pan, then places the front of this foot onto the bath mat, thereby depositing the partial foot print.
6. Guede towels off one or both feet, puts his trainers back on (inside the small bathroom) and returns to Kercher's room carrying some towels (again leaving no prints, since his trainers have no blood on them at this point).
7. Guede uses the towels to mop up some of the blood in Kercher's room, but in the process he steps in some of the blood, thus transferring blood onto the sole of one of his trainers.
8. Guede decides to leave the cottage, so he leaves Kercher's room and walks down the corridor and into the kitchen/lounge towards the front door, depositing the bloody shoe prints in the process. The shoe prints fade as the blood is cumulatively transferred from the trainer sole to the floor.
9. Guede realises that he cannot open the front door without a key (and the bloody shoe prints clearly show hesitation and a change in direction). He turns round and returns to Kercher's room with the intention of taking her keys. Note that since all the blood on the sole of his trainer has now gone (having been deposited on the floor in the bloody shoe prints), there are no bloody shoe prints returning to Kercher's room.
10. Guede enters Kercher's room and finds her keys. In this final visit, he does not step in any blood.
11. Guede leaves Kercher's room for the last time, and decides to lock her bedroom door behind him (since he now has her keys in his hand). Having done so, he walks to the front door, unlocks the door, and leaves (neglecting to re-lock the door behind him). There are no bloody shoe prints related to this final exit, since Guede no longer has any blood on his trainers by this point.