@Platon42: Thank you very much for explanation, you are probably right, I would like just add, that most of the "duplicates" occur after setpatch (eg. rom update, filesystem, excec...) they are not connected directly to deneb's flashrom, because when I remove the deneb, I see the same results. So far, I haven't put romupdates into flashrom, but I plan to do so soon :-).
@Zac67: When I choose the More button, I see the same details for both romtags.
Thanks for your answers...