Bug: Duplicate (E4) resources still show up in searches

Inferior duplicate resources (usually E4) were automatically “hidden” by the software but still appear in search results. They should be properly hidden so that this does not occur.

Software version: 4.0d Beta 3.
Reported by Dave Hooton.
Forum link: https://logos.vanillacommunities.com/forums/t/18281.aspx
Status: confirmed