The corporate overlords are not screening your bugs, the engineers are. Your mention that your bug got closed as a dup? And that the dup was closed as not being reproducible? It seems likely that either it wasn't really a dup or that the second bug didnt have steps that allowed it to be reproduced. In your case, I would think re submitting your as a new bug, referencing the other two, would probably bring some traction. Openradar is also an option for making your reports more public, and possibly getting more traction.