authors with different numbers of initials do not get merged

When I group my publications by author I noticed that my bibtex file is inconsistent in that the same author might be listed with a different set of initials in various places. Although BibBase seems to know how to handle this for spotting author links, it does not do so when I group my publications by author. As I pull my bibtex file together from different (dynamic) sources, rectifying this is beyond my powers. Can you take care of this issue? Thanks. Koen.