A* Pathfinding Project, Funnel Path Goes Through Non-Walkable (2D)

I set up the grid graph, rotate the axis, applied the 2d physics, and selected the collision layer to make sure all the wall were non walkable.

However I need to use a Funnel modifier, as the default paths are too jerky, and the enemies speedis totally erratic. Funnel sorts this out perfectly, But when I try to make the enemy navigate a complicated path, the path generated is terrible.

See Images: (grid graph setting viewable if you click on the attached image below.)

I need to find a way to make funnel create better paths in the grid graph, and I'm hoping someone out there can help me and point me in the right direction.

Hope you can help.