FlyerTalk Forums - View Single Post - How have I booked two seats for the same flight?
Old Oct 13, 2016 | 12:45 pm
  #6  
NWIFlyer
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I've had this before, and I suspect it's caused by your itinerary having multiple carriers and/or PNRs.

This can cause a different seat to be allocated under each PNR, but only the one under your BA PNR will be real.
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