To get the right side to line up with the left side you need a short piece of straight track between the R628 and the R8078 points. I would have used another R8078 right hand point instead of the R628 then the geometry would be correct and would allow another parallel line to the right. Hornby have not got the geometry wrong, flexi track is made to sort out the problem you have, replace R628 with a length if flexi.