I've been having strange problems searching Ellingworth's Hebrews commentary -- I won't go into detail but you can read about it here -- http://community.logos.com/forums/t/50341.aspx
I have 'Show page numbers' selected for this resource and get the wrong results. Would someone else who owns this resource try turning on 'Show page numbers', go the beginning of the resource, and do a 'Ctrl-F' search for 'weiss'? The first hit will be in the introduction. Hit find next occurrence and see if it finds the correct string.
I don't get the wrong results when I don't have 'Show page numbers' selected. It only shows up when I do have this option on.
Thanks - Gary