Subscribded to iTunes Match last night and quite quickly went through the process pain free. However I noticed that some of me iTune album puchases did not appear in my new iTunes cloud space from my iPad whilst others did?

When I now go onto my iPad and switch on Itunes match it states that "ITunes match will replace the music library on this device". I suppose my question is is this permanent as this is a problem as I have previously stated all my iTunes album purchases do not seem to have been relcated to the cloud and I am worried I might lose these.

Of course the reason for doing this is that my IPad has ran out of space and I was hoping to store my music library in the cloud and delete from iPad. I take it this is okay to do so once I've cleared up the rpoblem above?

Thanks

Lindsay.