Discrepancy: +1's on ads vs the actual number on my Google Plus page
I've added Social Extensions to an Adwords campaign for some time now. There is a big discrepancy between the number of +1's showed on my ads and the actual number on my Google Plus page (as a matter of fact, is about 3% of said number). The number that's showed is the same for any of us no matter if we're signed on to Google Plus or not, etc.
Can somebody please help?