Sorry it took me a while to get back to you on this but I can't repeat the problem here with your examples. I enter "tapes klar muzak" into the search field and set my filters to Title and Release. That gives me one result from DiscoGS.
Searching for "Pioneers - The Beginning of Danish Electronic Music" again with the filters set to Title and Release I get two results, the first one being the correct one.
If this is not the case for you, please download the latest beta version for CDpediaBeta 23
and let me know how the searches go for you there.