As a data point, on the flight out i had 2F reserved from a couple of months back. When i went to OLCI 2D was shown available , i tried to move my companion to it but it was shown taken on her screen. I then moved myself out of 2F to a row further back. Her screen then showed 2D and 2F available so i was able to move her into 2D and myself back into 2F. I assumed BA were blocking 2D as i was a Silver in 2F. I think this is what is happening now with the above ?