XBox music - download issue, songs missing

using surface RT with windows 8.1. Had no issues downloading songs onto the surface last night, but today, im tryign to add a couple of albums to my collection and it wont download, just says 20 songs remaining.

The songs downloaded fine on my pc as my settings says to download automatically if i add from another device. Anybody have a solution? Internet works.

Also, why do some songs in an album i am trying to add are missing songs? Meaning, if i open up the details even before adding to my collection, there are songs missing .

For example i am trying to add the gladiator score to my collections, the two best tracks are not available to add to my collection The battle and the barbarian horde. Any reason for that? The other songs are there.

Any help?