Originally Posted by Dazium
I got the 100% achievement WITHOUT the Marathon Man achievement. I also had the 1.#R glitch, so after I had the 100% achievement, I done as suggested and set up a contraption on a new save file and got the achievement.
Keep making sure you have followed the list to the letter, keep saving and restarting your Xbox for the Errands to appear, and you will soon have 100%, good luck!
Same situation for me. My running and swimming distances glitched to 1.#R so never got the running shorts. Fortunately there's enough errands to make up for it, I got 100% after 43 or 44 errands (I think there's 50 in total).