I suppose her label thought only her most devoted fans will buy the album, and those same fans would buy it even if it's in two parts so why not mooch them more?
Eventho I'm her fan, I have no interest in this release. most new stuff are just new edits of existing mixes, and not really new remixes it seems.
Besides I don't think Dannii's early music has aged well, Kylie's 80s songs just have more retro-appeal.