1) You activated the network (cross-domain) features
Please fix that with the following steps:
a) Empty your index first
b) then, on screen 2.1, on option “This search is part of a network search”, select “No, this is a standalone search ”
2) You chose post types “Downloads” on screen 2.2
Deactivate it, and re-index if not necessary, or if your theme cannot display them in search results.