Yes on roll 3.

The overdevelopment could be down to over agitation or an inaccurate thermometer, etc. Or maybe you take 30s between end of nominal time and getting the stop in there? Easy to do and it's why people recommend you calibrate your development to your own processes.

The overdevelopment isn't severe or problematic though, they should print OK (if contrasty) on grade 1 or 2 especially if you use a diffusion (not condenser) enlarger. I wouldn't worry overly about your chemical process yet, it's close enough to be getting decent results. Postprocessing (OT for APUG) definitely seems to be the shortfall so have a read of the scan howto in my FAQ; ignore the colour but note the black point and "brightness" parts carefully.