Longmill not cutting consistently

All of a sudden the results of cutting an inlay (v-groove inlay) is awful. Not at all like the Aspire image, a lot of chatter and it appears that the second pass is offset from the first.

Using a 60 degree v-bit, 1/2" did, 1/4" shank. in a Bosch router.

Aside from a really ugly bunch of unexpected trans in th cut, it appears that a second pass cut is offset from the first pass.

Here is the Aspire rendering

Here are 3 images of the final result:

I cannot believe this is a software issue - but rather the hardware has gotten loosy-goosey, but really could use some seasoned suggestions.