The mikme Android app is still in its early stages, which means that sometimes things go slightly awry. For example, you may find that your audio files appear to get stuck and won't sync or resync. But luckily, there is a simple way to fix that without losing any data.
Open your mikme Android app
Go to settings
Press "clear song cache"
Go back to your app library and attempt to sync or resync the file
Success! It's as easy as that.