Hi Charlotte!
I have AI CC 2014 installed, removed old versions of AI from my computer, updated everything and looked into fixing stuff that was "up to date" on the CC page, just like you pointed out. I still find no indication of a way to transfer .idea files. They don't show up as .idea files, they go to the Cloud as .PNG files. (I'm writing this in the hopes that an Adobe agent is reading these posts.)
I'm not surprised you are still having sync problems, that seems to be consistent with Ideas. It comes and goes for mine, but still it only turns them into PNG files..... I wish there was better help for this.
