So it would appear that the authorisation was after the first bus journey and was for a full bus cap. When the amount is confirmed over night it probably won’t change the time of charge.
I’ve not heard of that high a charge being authorised, but then I rarely use buses as a first journey (the station is nearer than any bus stops for me). I also usually use my 60+ these days.
TfL perform an authorisation after the first touch when you haven’t used the card for a few days, or sufficient time has passed since the previous one. I’ve never really got to grips with the criteria for when they authorise or not. If you use it every day then they may not authorise as long as the daily payment requests are honoured.