Okay, so I actually know the answer to that question. It's because I keep not picking it up to work on. It's definitely time for me to move on to something else because I'm definitely getting fidgety on it. However I do nearly have a page finish (finally), so I might as well finish the page now. Plus today I can suddenly see the shape and scale of the page rather than a random shmush of pixels, so at least it's coming together, despite all my procrastinating and moaning!