The Yad Vashem victims' database is, unfortunately, a mess. There are so many redundant and questionable records that it's difficult to trust the information. Just yesterday I was looking for information on a person, and when I entered a last name I got 100+ records in addition to the one that I was hoping to find -- but there were only about 30 individuals represented in these records. I submitted over 20 reports of duplicate, triplicate, and quadruplicate entries. (And I classified myself as a "researcher" in each of these reports submitted, since I'm not related to any of these individuals.) The process is tedious, since the form must be submitted separately for each set of duplicate records, but I considered it worth doing in the interest of data integrity.
I received 20+ responses promptly, within less than 24 hours. Each message said, "As a result of your query we have connected the entries relating to the name you mentioned. Note that this will be visible in our online database only after the next update of the database which is updated every three months." -- Yup, less than a day to correct, but up to three months to make the updated records visible.
--Nevet Basker, Bellevue, WA
Researching names: Basechis, Klughaupt, Lieberman, Laubfeld, Heilpern
Towns: Zolkiew, Uhnow, Rawa Ruska, Brody