It honestly seems that the transition between the routes isn't @ Exit 47 any longer. It seems like it's another ON-17/417 transition type of thing. lol.
There's currently a NB A-15 shield over 1km south of the end of the divided highway.
Now, there's no shields at the transition point from 4 to 2 lanes, but I assume that's where the official swap of the designations is currently.
The A-85/QC 185 endpoints conform to our usual practice of using the last interchange as the endpoint. That is what we did with the north end of A-55/south end of QC 155.
Construction is underway on connecting the two A-85 segments and eliminating QC 185, planned to be complete in 2026. Even before the project is complete, A-85Not might get extended to a new interchange west of exit 47. Either will make this issue go away for A-85.
I would wait on A-85, and also leave A-55 alone.