Well, I have photos of 502 with 4458 eastbound, east of the Don, 4481 westbound at Ontario St.
When? Possibly they are showing 502 sometimes when running into a yard? Or testing? Looking at the vehicle histories of both 4458 and 4481 for the last week, there's no mention of 502 on either.
https://www.transsee.ca/triplist?a=ttc&fleet=4481&date=2018-06-25
Before June 25 2018, there hadn't been any streetcars on 502 for months ... gosh, since October 7, 2016 according to the schedules ... was it really that long? Either way, as 4458 didn't enter service until 2018, there's no indication it was assigned to 502 last week, and the photo is near downtown instead of out on Kingston Road, it doesn't conclude much.
I am going by what the tracker was showing at 1: 40 am
If the tracker is showing a 502 (or any streetcar running on Kingston Road!) at 1 AM, it's likely wrong. Or a 504B failed to set the switch correctly - and surely this does happen ... I've certainly (rarely) seen operators caught by surprise at other intersections!
Whoa!! is 4483 going back to TB??
Just because it broke down near Hillcrest during testing, doesn't mean they are shipping it back to TB? Even if that were to happen, I'd think they'd be thinking about it a lot longer. It's reportedly back at Leslie.