you can see that the local files are downloading successfully when it started downloading immediately same as those that are available in spotify, but if you see the 'waiting for download' taking too long, it's NOT going to download. that's what I'm experiencing now.
Re: Can't sync personal tracks from laptop to iPhone app
I had the same issue. The tracks weren't even showing up on the list on my ipad. However, I went into the app store and updated the spotify app on my ipad. That did the trick and the tracks appeared! Did I really need the update? Probably not, but it forced spotify to shut down and open back up again and that's probably really what it was. Good luck!