premium user : playlist available offline : Bug (more than 3 computer... but not !)

[youyou2223]

Hello 

I'm a premium user and I use the possibility to have offline playlist for my iphone (use in the Tube, plane ...) 

I also use spotify on my macbook pro

I've frequently the same bug : at any moment when I launch the spotify application on iphone, sometime I've a message saying that I ve to type my login and password and just after having specified such information properly, I've an error message saying that I've synchronised spotify with more than 3 computers and that I've to restart the application to continue

After the restart, all my offline playlists are gone and I've to dowload such playlist AGAIN ... and its quite long ....

Do you have any idea for solving this ?how "reinitiate" the computers "recognised" by spotify with my account and to select only my macbook pro and my iphone ??

thanks in advance for your help