Syncing local playlist on iphone issue: playlist wrong song number in green progress bar changes

[rikaio]

Tried to get some buzz words on the title, so:

Im syncing a playlist from my desktop computer to my iphone (same WIFI), it has 974 songs, it says that in desktop app and in mobile app.

Get in, check "Download" and everything starts going great.

It takes 10min to go from o to 900, and about then, to total amount of songs to sync changes to 1280, and the progress bar takes another 25 minuts to complete those 380 songs.

WHY??? why does it changes at the end?? the playlist ONLY has 974, and that's what is says EVEN after finishing with the theoretical 1280 songs!!! (???)

HEEEEELP !!!