One thing that looks confusing to me is that you are programming a 5/8-18, you are using radius comp, yet your programmed radius is only .065 seen here...
N465 Z-0.2144 I-0.0650 J-0.0000 F1.0
If you have a radius value in your offset, but the program is not really expecting one, this can make the results counter-intuative i.e. they look all screwed up.
Look into that and post back here
Control the process, not the product!
Machining is more science than art, master the science and the artistry will be evident.