Originally Posted by Efrem
...Can I do this without screwing up the ONE by returning to my point of origin?...
Yes, IMO.
Goodness, if doing part of a xONEx, going home, doing another part, going home, ... etc, were illegal there would be hundreds of us in trouble.
AA's ToC show these three practices as illegal:
* Back to Back Ticketing
* Throwaway Ticketing
* Hidden City/Point Beyond Ticketing
For starters the OWE is not an excursion fare, so that wipes out the first two, and the third is definitely not meant to discourage, much less prohibit, the purchasing of multiple fares as described.