As mentioned above, start over BUT if still no joy:
Bent derailleur hanger? Park makes a tool, a bit pricey for personal use, but your LBS should have one, that will check for this quickly. Bend or replace if it's out of line. No amount of adjustment can compensate for a out of line hanger, IMHO.
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His: Trek 7500FX
Specialized Roubaix
Spouse: Trek 7.5FX