Hi -
I tried this on my Mac with Prelude CC. Source format is AVCHD, destination format is Quick Time ProRes. I tried with transcoding enabled and disbaled, transfer clips to two destination and so on. But I failed to reproduce the issue you encountered. Even so I still want to collect more information. You said that rename works well on an additional machine, did you try this with same source media, same destination format and same rename preset? Could you share a screen shot about the ingest dialog with me? So that I can see your setting and the structrure of the rename preset.
Thanks,
Jenny