Hi Aaron,

> Then I tried to add another projection + trim and this happened

That's usually a sign that the trimming curve is not quite intersecting the edge of the surface you're trying to trim.

Zoom up to this area shown in the picture.


You can see the trimming curve is not quite there.


Make that end a bit longer so it intersects the edge of the surface and it should trim fine.
Another thing, if you're projecting those trimming curves along one of the x,y or z axis you can just
do a trim straight up, it's not necessary to project the curves onto the surface then trim.

Cheers