This is DIY of a sort, so only slightly OT.
A couple of years ago we stripped and levelled one area of lawn and about a year ago did the same to a second one. In all there's probably an additional 20T of top-soil compared to when we started, from two different sources. Both were thoroughly seeded but the grass grew in patches rather than evenly and the overall quality of lawn is pretty awful. The first area also has soft bumps where the grass has grown.
Any lawn experts out there? What's going on and how can I fix it?
Dave