Intermission 49 begins as follows:
"Turns since TBfGK: 55
Thirteen turns ago, Vinny had woken up beside her and said, "Hey. I think we should go meet the neighbors." "
Most of the events described in Intermission 49, including Duncan Scone's capture, did not occur in TBfGK 55. They are a flashback to the events which occurred 13 turns before that, in TBfGK 42. And TBFGK 42 is the same as 51 AW.