Make sure to select the correct post types you want to see on the results list under the General Options -> Sources panel. If you are using the index table engine, then those post types need to be selected and indexed as well.
The reason you are seeing those items multiple times, because one is from a category and the other one is from a tag. Those are taxonomy term results (archive page links), which are different from default post type results. Themes, and WordPress search in general does not support displaying taxonomy terms as results – that is the reason of the missing information. The plugin “tricks” the internal wordpress search to think those are post types, and changes the links before clicking. However, images, descriptions and other information cannot be changed, so themes cannot display them (as they are non-existent in the first place).
If you don’t want them in the results list, you can turn them off under the General Options -> Sources 2 panel.