Did you import the address or the private key? If you imported the address it could be the first 5 Bitcoin payment was made to your public key.
If you imported the private key: does it show the correct address?
I have imported the address and re- synced the wallet. I did not want to import the pvirkey after i saw that the balance does not match, tho the wallet address is correct. I did not import my privkey as i have heard some stories that people lost their bitcoins just because of stupid mistakes they did. So i have to export the public key out of my privkey?