The reason for using the RPM package was to install a already compiled (working) version of dmalloc and NOT to have to install a self-compiled version (configure + make + make install)
Now you have dmalloc installed twice!
I would recommend to remove (deinstall) your self-compiled version.
It should be easier to manage (update, remove, etc.) your Open-source software like dmalloc with the RPM Package Manager.
Regards