I don't think either of those words is appropriate in the sentence. If there are "two levels of meaning" they should be discrete; there would not be a boundary between them that one could approach from either side. The sentence (or whatever we are dealing with) might be ambiguous, but that's a quantum leap from one interpretation to the other, not a slow creep toward a blurred borderline. Maybe "The different meanings were intentionally blurred" would solve the problem.
Interested in Language