Final Update Here:
DO NOT ATTEMPT TO DO THIS
After fighting with CO for a long time they will not relent and will not re-issue the ticket even though multiple reps told me it would be done. I negotiated with them and they allowed me to cancel all the tickets for free.
Thanks to Dan's post about flying blue now working RT I was able to change my flying blue ticket as well from a OW->RT. Now I'm flying for 50K RT with a cheap infant ticket!! Amazing!! Thanks Dan!
One thing which worked out nicely was that Flying Blue did not charge me a change fee (even though multiple reps said they would). Seems like they booked me two OW tickets. I thought this would cause an issue with the infant ticket and Delta, but Delta had no issue with booking a RT infant even though I had two One Ways.
Bottom Line, when flying with an infant buy a vanilla RT ticket (with no stopovers

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