Different Bus on the Way Home, too.

I don't know how I did it, but despite catching the 610 at 4:05pm from the QVB, the bus didn't go via the Lane Cove Tunnel, and took an extra 25 minutes to get to my stop.
Funnily enough, when I looked at the timetable yesterday, it said that it arrived at the M2/Oakes stop at 4:50pm, but I was pleasantly surprised when I arrived there by 4:25pm... but today my bus arrived at 4:50pm after taking a different route home.
In fact, Leanne called me at 4:20pm, and I'd only just crossed the Harbour Bridge... when the day before I was nearly at my stop.
So I need to figure out what happened.
I don't remember if the bus went via Wynyard yesterday... I don't think it did.