refdbib: multiple occurence of the same reference ends up in multiple entries in .bib file

Dear Sirs,
I have some trouble in creating my bibliography using a refdb-database. 
My text is spread over several files, connected via \input{} statements 
in a main head-file. Running latex/pdflatex on the head file, creates an 
.aux files, which is used by refdbib as input. refdbib then retrieves 
for each entry the appropriate reference from the SQL DB (postgresql 8.4 
server on a FreeBSD 8.0-STABLE platform) - but there a multiple 
occurences of the same reference, exactly as many as \cite't in the main 
text. Is this a feature or a bug?

Regards,

Oliver

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