Download playlist stuck in endless loop

[Dfarquhar]

I'm trying to download a playlist to my Android phone of around 1000 songs that has previously downloaded fine.  But as Spotify downloads it, the notification showing the number of songs downloaded starts increasing both song counts.

So it will start with 

Downloading.... 1 of 1000

Downloading... 2 of 1000

etc

but then later on will go

Downloading 450 of 1000

Downloading 451 of 1001

Downloading 452 of 1002

and both numbers will keep going up and it never finishes downloading.

Any ideas?  Its driving me nuts as I can't download this playlist containing my favourite songs