IANAL but I have been a cop (previously full time, now just PT to keep my standards). That *should* have been covered under the initial warrant - as the cops were looking for the items in question in a reasonable place. If I am looking for diamonds, putting them in a closet seems reasonable. If I am looking for a 46" TV, looking in the kitchen drawers (and finding contraband or an illegal substance) won't fly. Its not reasonable.
That the evidence got thrown out is likely the result of some other issue. I can't speak for a specific case, because I wasn't there, but there is something you were not being told.
Just my 2