We Booked our seats when we booked our Holiday as it was a special one as my Wife was going to be Fifty while we were away and let the travel agent know this and it was on all of our paperwork, then a Month before we departed we had to contact our travel agent for some reason and asked about booking our seats and was informed we had already booked them, which we had for got about. The travel agent informed us that KLM had changed where we were going to be seated and was ask if the new seats were ok, which they were as we were still seated together, sat next to each other. When we checked in the seats had changed again and we was sat behind each other and was told this was for operational reasons, as I am Deaf in one ear, this made chatting to each other during the eleven Hour flight very hard. But sitting behind my wife on the plane was two men not known to each other, who were seated one in the window seat and one in the gangway seat, with a spare seat between them. We were not happy and made it known to KLM. and why don't they board the plane from the back first when only using one front entrance, it just causes delays.