Sometimes, the iTunes store will show your release as live. It will have buy links but when you click on it, you get the following pop up message:
Or you may only see a few tracks or just the digital booklet showing for your album.
This means that iTunes is still in the middle of processing your release. The good news is, there is no problem with your release at all and it has been accepted by iTunes. It could take 24-72 hours until it's available to purchase in the store.
Please note that if you have set a future release date, the stores will wait until that date to make your content live and any store links will not work until the release is fully available.