A Taste of Logic

Here's a little sampling of the kind of stuff I work at on a daily basis. Can you puzzle out the solution?

Oh, yeah, it's a puzzle about people running a marathon in silly costumes.

1. Katherine finished exactly 5 minutes after the runner who previously participated in exactly one more marathon than the person whose number is exactly 2 lower than the number given to the one sponsored by Labyrinth Books. The runner surnamed Geller previously ran in exactly one marathon fewer than the person whose number is exactly 1 higher than the one who finished exactly 10 minutes before the runner who wore the chicken costume.
2. The runner who dressed as a Viking previously ran in exactly one marathon fewer than the person who finished exactly 5 minutes after the one whose number is exactly 1 higher than the runner surnamed Jabez's number. The runner surnamed Maguire finished exactly 20 minutes after the person who previously ran in exactly four more marathons than the one whose number is exactly 4 higher than the person surnamed Maguire's number.
3. The runner sponsored by Tress Salon previously ran in exactly one marathon fewer than the person whose number is exactly 2 higher than the number of the one who finished exactly 10 minutes after the runner surnamed Stockman. Nick previously ran in exactly three more marathons than the person whose number is exactly 3 lower than the number of the runner who finished exactly 15 minutes after Nick.
4. The runner who dressed as Superman finished exactly 5 minutes before the person whose number is exactly 2 lower than the number of the one who previously ran in exactly two more marathons than the competitor who wore Zee running shoes. Quincy finished exactly 5 minutes after the runner whose number is exactly 1 lower than the number of the one who previously ran in exactly one marathon fewer than the person who wore Rath running shoes.
5. The person who wore Dio running shoes finished exactly 10 minutes before the one who previously ran in exactly two fewer marathons than the runner whose number is exactly 2 lower than the number of the competitor who dressed as Elvis. The number given to the runner sponsored by Arcady Diner is exactly 2 higher than the number given to the one who finished exactly 5 minutes before the person who ran in exactly one more marathon than Harold.
6. The runner surnamed Brotsky's number is exactly 2 higher than the number given to the one who ran in exactly one more marathon than the person who finished exactly 15 minutes before the competitor sponsored by Dynamo Power (who dressed as either Elvis or Superman). The runner sponsored by Pinpoint Tailors finished exactly 10 minutes before the person whose number is exactly 2 lower than the number of the one who ran in exactly two more marathons than the competitor sponsored by Pinpoint Tailors.
7. Are you still reading this? Most sane people have given up by this point, as this puzzle is more confusing than most of the longer IRS forms. I mean, I work on these things every day, and even I think this puzzle is hard.
8. Look, to be perfectly honest, you can't solve this puzzle. I've left out a couple of crucial pieces of information, just to torture you. And are you really that concerned with these fictional idiots that you just have to know which one wore what brand of running shoe? I mean, COME ON! GET A LIFE!!

nicoel nickname of the day: VV