If you're down inside a hole, the Spiral and/or lead in radii can't be too large or it will cut into your geometry. You can use the hole radius minus the tool radius minus .010" for safe lead in and spiral radii.
With your geometry and cutter specified in the the original post, .078" radius would be safe.
If you look at your toolpath in a top view it will show if your lead-ins violate the contour.
The reference to linking and leads is in the Z-level setup boxes.
Here's the leads tab:
Attachment 76807
Here's the links tab:
Attachment 76808