Why does music disappear for hours on iPhone after downloading from iCloud?

Hi,

I'm experiencing a very very annoying issue with downloading iTunes Match music on my iPhone 5.

This has happened on numerous occasions since subscribing and I cannot seem to find any mention of it within the community.

The general experience goes like this:

1. I purchase new music (not normally from iTunes store) and then add it to iTunes on my iMac.

2. Match syncs the music and either matches it or uploads it to iCloud.

3. I want to listen to the new music on my iPhone 5 on the way home from / into work so I hit download (so I can listen on the underground in London!) before I leave home / work.

4. I look back at the phone after 10-15 mins and the tracks have all downloaded, BUT have now subsequently completely disappeared from iTunes. I search for them in the Artists area / "Recently Added" playlist and they do not exist.

5. I am connected to 3G for a couple of hours and still NOTHING appears.

6. Finally at some random points hours later, even if on wifi, the new tracks suddenly pop up in iTunes on my iPhone.

The immediate most burning question is how, after just supposedly "downloading" to the iPhone, can it possibly just simply disappear - this is one of the most ******** user experience journeys I have ever had the displeasure of experiencing.

It's so illogical and annoying it's beyond belief... this really is a deal breaker for me using Match.

Does anyone have any knowledge of this and possibly shed any light on it?

This one issue basically makes me feel like cancelling / not renewing my Match subscription.

Thanks in advance,

Justin