I got +0 reputation for a commitment through referral on the India proposal.
The user has not un-committed from the proposal so far and this is reflected on the proposal page.
I noticed same problem at my proposal and I think I found the answer.
This problem will happen if the user that you refer clicks on the Commit button, but doesn't confirm his email address.
In this case you will get notification that you referred someone, but you won't get any reputation bonus until that person confirms his/her email address.