I was happy to see good attached flow too. I couldn't make out what was going on on the top by the top/side transition. Glad you saw nothing unusual.
Yeah - the upward flow on the side was what caught my attention too.
We saw evidence of the same thing in the
Ford Ranger aero cap video.
Flow will travel from high to low pressure, and above the arc of the cap is lower than the sides, so that's what we're seeing. If the cap were tapered in plan as well as profile, those side tufts would probably be closer to horizontal. (You can see this in the tuft vid of my boat tail.)