HI Andy,
I don't think I've changed it in the past so it may have always overlapped (and I'm not sure that it mattered as it showed as farmland on the map. Anyway, in my OCD way I've now changed it so that it doesn't overlap. Joe

Gradually redrawing the boundary of heathland around the centre of the dark peak (kinder/bleaklow). It's a work in progress and I slightly nervously deleted the old boundary area as it seems much easier to draw a new one than edit an inaccurate old one.