Albums get SCRAMBLED with use of "Update Album Info" command

> I have Windows XP(sp3) and a problem in WindowsMediaPlyer 11.
>
> I download much mp3 music as Entire Album sets, along with the appropriate
> AlbumArt [Large+Small], and Folder jpg's intact.
>
> These are put in appropriately named Folders, and the Folder jpg is assigned
> @Rt Click>Propeties>Customize>Set correct File type to "...for one album.,
> then "Choose Picture".
> The problem's are that when WMP11 is engaged, some of the files within the
> Album Folders are mysteriously changed, for example:
> - Track Numbers [at file name 01, 02, etc.] change,
> - certain Properties are changed, such as Album name, year,
> - and Incorrect Album Art Materializes [that was not even on my PC before].
>
> Also, when I Rt-Click on an Album Cover and tell WMP to "Update Album Info",
> usually the Correct Album Art shows up and the list of songs is OK.
> But, somtimes WMP will tear an Album apart into two or three [2 or 3]
> different albums, and that's when I discover the changes within the File
> Location Folder.
>
> HELP, two different complimenatry Anti Virus/Anti Spyware programs cannot
> find any Malware on my system, so I think the culprit is in WMP 11
>
>
> --
> KTM, Saco, ME