Your antibodies never went away even after SVR, you will always be positive for antibodies, nothing you can do about it. If your worried you will have to get a RNA test to see if you have been reinfected but from your statement I doubt that is the case.
A reactive antibody test does not necessarily mean a person still has Hepatitis C. Once people have been infected, they will always have antibodies in their blood. This is true if even if they have cleared the Hepatitis C virus. A reactive antibody test requires an additional, follow-up test to determine if a person is currently infected with Hepatitis C.