Thanks for the reply.
Source is ProRes 23.98 full HD. My AME settings were "h.264 bluray" and I defaulted to all its choices, including "matching attributes".
Basically I was hoping I could encode in AME and then do mulitple copies on Encore, without the dreaded "need-to-transcode" (since I thought I had that covered in AME).
Encore was not a problem so much as, what seemed to be, a desire to transcode each time. (I have since been advised that it might have just been building, not transcoding.)