I don't want to open a can of worms but I have 1 question, is this increase happening to everybody because my checks are the same...?
Indy I could be wrong here but I would think your check should have been affected. The way to tell is look at your FICA withholding. Since your checks vary, you'll need to figure the % withheld last calender year and the % withheld now. The FICA amount withheld in December should have been 4.2% and now it should be 6.2.
As far as what everyone else is telling you, I think most, if not all of it is true, but their comments are related to your federal tax rate not your social security tax.
Your check may have been the same because you had an extra hour or something, look into the actual rate.