This has been mentioned under another thread but I think it's worth including in this thread where it might better receive attention of CO's programmers (or am I being assuming too much?).

My wife had a two month old milage award reservation EWR-CDG-NCE with a CDG-EWR return. The CDG_NCE segment was on AF. THe segment has been in the record all this time as I've checked the record occasionally to look at seat assignments. WHen I looked today, the AF segment had disappeared. I call the Elite Desk and they were able to restore it, but could not tell me why it had dropped out in the first place. Last year, we had a somewhat similar situation where I put a reservation on hold for a few days and AF dropped their segment in the interim.

These could have created difficult situations if I hadn't been checking on a regular basis and we arrived at the airport and found we had no reservation. I realize that this had to do with a partner, but CO should have some type of checking software in place to alert them to changes like this and/or alert the OP.