Ok, so I tried reading around about it, I don't really see alot saying one way or the other, but maybe the space in the User's name is causing the error?
1 other thing I noticed looking at it:
You have 0:0:65534
Well for 1 I think 0:0 is root, so I think you'd be giving this person root access, and 2....
Ahh, just tried it on my box, yeah it looks like that's your problem maybe. You've got too many entries. 0:0 will set both user/group as root's gid/uid I am thinking you maybe want something else, either way, you've got too many entries there for user/group so look at this part:
And either remove a 0 to take away the root gid/uid or remove the 65534 to take away the "extra" gid.