Why do you even think that could possibly work!
eg why would Adobe link AME to FCP.
One solution would be to export, self contained from FCP, bring into Encore and re-create your chapter markers.
Another is to export self-contained and bring into Premiere to re-create chapter markers.
You can use XML to transfer your project into Premiere
Based on what appears to be your Creative Cow question, you simply have to correct the image width for the problem clips using the Effects Controls / Motion panel. Or importing the clips individually and re-editing into the sequence may corrrect the pixel aspect problem.
What would be the best solution for this?
Export out Blu-ray compliant files using Compressor, then bring those into Encore.
You'll have to recreate your chapter markers.