Multi-Axis Pocket/Sweep

I'm struggeling with my mutli-axis operation

ProblemImage
Why is my multi-Axis sweeping intersecting with my part?

Why is the multi-axis sweeping only half of the ring? Can I make it go 360 with one operation?

More important it leaves an area unmachined. how can I at least make it do a full 180°?

How can I produce a multi-axis pocketing operation to rough out the slot of the ring?

The multi-axis sweeping operation has no depth passes setting, korrekt? In that case I need to use another operation for that.

 

How would I limit a multi-axis operation? I can't select 3d geometry from the part since that will not work for some reason. In the example above I obviously want to keep the operation on the part.-

Thank you for the help!