I can get LAX-MIA-PTY-MIA-DFW-LAX with a same day turn in PTY for $337 AI, and $315 AI with the 10% discount.

This requires and overnight in MIA (outbound) and DFW (return) and a tight connection in MIA on the return, but I was wondering if the same day turn is legal as the fare rules indicate a 2 day minimum. I am booking this on AA.COM. I suppose if AA.COM issues the ticket, then I am fine with it. The two hotel nights increase the cost for the true MR, but I can get cheap hotels in both cities.