Pathfinding Clipping walls, getting stuck in walls

Hey guys,

I've been trying to get pathfinding to work properly but I'm at my wits end. The red squares always partially go into the wall, sometimes ignore a wall completely or get stuck in them. I've tried many different cell sizes with positive (and negative) cell borders, but nothing seems to work. I had best results with cell size 70 and border 0, and making the layout walls match the show grid (70x70) but it's still not passable as a game since the wall issues still happen just not as badly.

Could someone take a look at my .c3p file and let me know if they have any luck with it? Thanks guys I really appreciate it:

https://drive.google.com/file/d/1_5Kqc7URgoV2Gq45h-UXi-0oC4y1WVCs/view?usp=sharing

I have had the most success with adding an invisible, but larger than the original, sprite over wall corners or thin walls. Basically anywhere where objects are getting stuck. Then assign that sprite object a high pathcost.