Actually, 2nd assignments for Josh and Jason are still provisional. Last year they moved them around as necessary depending on the fields. We didn't know last year where Josh's second JPG would be until a couple weeks before. I wouldn't assume that they are "set in stone" until they appear on the USFSA site. http://www.usfsa.org/Athletes.asp?id=216
(And even then, they have been known to change those listings before too.) So Josh may not face Yan after all, they may shift him later.