Jen,
After the fact it's very tough. During a shoot, actors are usually directed not to "cross each others lines" to keep this form happening.
So how about this. Look at the overlapped sections of the two tracks. Zoom way in. Cut the overlapped section of the off mic so you can move just the overlapped portion. While looking at the waveforms, slip the off mic track so it lines up with the primary mic track. You'll be moving the off mic track to the left because the voice got to it several milliseconds after the primary mic. The number of milliseconds depends on how far from the primary talent was from the off mic mic. One foot per millisecond.
Time aligning the off mic mic should reduce the time smearing. Please get back to us to let us know how well that works.
Make sense?
Regards,
Ty Ford
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