Its Xvid, an Premiere does not like that.
You need to convert your footage to dv-avi.
Using ripped material (that may be copyrighted) from a TV program, encoded with XVid, is asking for trouble. PP is not suited for those sources. Better use another application for this purpose and get the help of a lawyer with the copyrights issue.
You need to convert the file from DivX to something editable in Pr like
DV .avi type-2 or a lossless codec like Lagarith.
You are actually pretty lucky to just have Audio sync problems, though I do not know why scrubbing would make any difference. With both Xvid and DivX one more often gets no Audio, or no Video.
Agree 100% on the 3rd party conversion, prior to Import into PrPro.