Retirement tax questions

Same problem here.  Just came up today for the first time.  Paid all 6.2% SS tax - doubled checked W2s and all are the correct 6.2%.  Do I just continue to file...I don't know why I would get a W-2c from employers as it is all correct??  Very strange.  We did have a 1099G (Unemployment income) but they don't take SS tax out of that...could that be a reason?