Clutch won't return off floor

So you have a new B&B 3 finger type (or similar) like this?
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I suspect something is broke or is moving on you that shouldn't be and you're not seeing it. You need to isolate each part and repair as necessary. The spring load of the clutch cover (pressure plate) should be enough to over come the pedal over center spring to at least cause the pedal to come off the floor and not just stay all the way down.
...Check the fit of the release bearing as it contacts the fingers. I recall someone having mismatched components where the bearing was too small in diameter or the fingers were too short.