My flight is 60 some days out but when I checked it today I found my seats had been changed. I was in row 13--first row in main cabin (I believe that is called bulkhead?) Today we are in the second row (14). Does the airline make switches like that or what could have happened? We had D & E but only D is filled. If I can't have the first row I believe I will switch to two aisle seats farther back.