The amount of influence you giving out reputation has depends on how much reputation you actually have. New users with 10 reputation do not have any influence. I, as of posting this, have 322 rep and an influence of 14 (I give users 14+ rep when repping them). 322 divided by 14 would be 23 (I assume maybe every 20 points is +1 to your reputation influence), and after repping you you have 24 rep. Perhaps you may give users +1 rep now? There may actually be some kind of minimum you need, I'm not exactly sure.