[mucky]

I have deleted all but 2 ringers and all but 5 alerts. Now neither of the ringers show as options in phone & sounds settings. They do show up as options for all other alerts I.E. new text,new mms etc. when I put back all the files I deleted everything works fine. I just don't want all the sounds. They take up a lot of space. So,how does this happen and can it be fixed. I do have 4 ringers as options:
Ring01-windowsphone
ring02-velvet
ring03-flame
alert-twitter

I haven't been able to locate the files or I would put the ringers I want with them.
Thanks for the help,
Matt