So Tommy - can you supply the ‘before’ downmix drum track to SB to look at themselves…? Have you raised a support ticket…? How long is the actual song (just curious, its not like 18 minutes or anything…! Ha!).
Something definitely seems weird about your described scenario…
You say everything ‘looked’ right - but then you say some of the hitpoint detection wasn’t accurate, which you know you can fix; so its the general malaise of the ‘drift’ of the groove that shouldn’t be happening - especially if later on all the hitpoints/warp tabs LOOK good after quantising, against the grid… I mean, thats just not right…
I may get a chance over the weekend to give this a go myself, see what occurs… (as they say in Wales…!)
bob