Thanks for spotting that!

When a road has separately mapped cycleways or sidewalks, it's better to replace (in this case) cycleway:right=track with cycleway:right=separate.

The mapper who originally added the separate cycle track should have updated the tagging on Pevensey Road, Dittons Road and Station Road at the same time. I've updated it.

https://wiki.openstreetmap.org/wiki/Tag:cycleway%3Dseparate