i'm probaby missing something very obvious, but every time i open/create a new video track, it comes with an fx (strong gaussian blur) already on. to work normally i have to delete effect.
Set up exactly the effects chain you want as the default for all new video tracks (probably none). Right-mouse-button click on the track header and choose "Set Default Track Properties". Make sure "Track FX" is checked and click [OK]. This also works for audio tracks.