This was brought up in the CAM open forum at the 2105 PLMworld
At the time Siemens was asking for the ER #s people had submitted, and I don't remember getting a response.
PPT on the PLMworld web site in 2015 presentation downloads (if you went)
Production: NX10.0.3.5 MP5 + patch/TC11.2
I'd rather be e-steemed than e-diseaseled
Planar Profile is as the name states one planar profile pass, if you want multiple side passes you need to use planar milling.
Planar profile behaves differently than planar milling with profile cut, and this is why you don't see multiple stepovers in planar profile - It is a very specific processor.
There are several ERs in the system to add multiple steper passes to planar profile, and you are welcome to contact GTAC and log your support for them.
I think your request should really be - how to cut the chamfers in multiple passes?