all 14 bolts leak; they always have and always will. Get used to it. Ive done 3 on my truck so far in 83k miles.
Its easy to replace it. You just need a spindle nut tool, something small to remove the circlip and then maybe a torque wrench if you want to be anal about setting the pre-load on the bearing. I just do it by feel though.
The seal is about 13 bucks IIRC. Advance Auto should have it, its not a dealer only item I dont think, because its universal to all Corporate/AAM axles. The only thing thats tricky/confusing is to remember to remove the WHOLE old axle seal, I pulled part of mine out the first time I did it and failed to notice the inner race was still in place. I stupidly kept trying to press the new seal on, and finally got frustrated and left it alone for a while. Came back and then saw my stupid mistake.
Maybe 1 hour job...its not bad at all.