SP2 patch KB954430 (Security Update for XML Core Services 4.0) re-installs over and over. SP3 already installed.

I installed SP3 at least a year ago on my Windows XP Pro. Recently, I modified the system to ask to install updates instead of doing so automatically.

Since then, I get requests to install SP2 update KB954430 repetitively. I installed it at shut-down a few times anyway. Why would it need to be installed at all, if I have SP3 installed already?

Should I remove the patch manually?

Thanks for the help.