Have you tried hitting CTRL - (that's the minus key) to zoom out or looking at it in another browser or on another computer? I'm thinking this is a settings issue. Looks good to me on my screen - no fuzzies or pixelation.
I think the key is reference. If you know where exactly in the passage to refer to, then you should be able to whip up a solid grasp of the concept. RC definitely, and rigorously, tests short term memory.
3 a week worked for me. I still had enough time to BR and could see my PT scores improving weekly. BR is the key to improvement so just make sure you leave enough time for it.