It can be a long frustrating job trying to get the air out, I think I would try bleeding the cylinder fittings since I assume the cylinder was empty when you installed it? I've had fluid come up and out the fill on the pump like you describe, probably from air that was compressed while turning one direction expanding when you turn the opposite. I don't know of a simple, easy way to bleed it, I've always just tried everything I can think of and generally made a big oily mess before getting it all out. Have lot's of oil zorbs handy. Good luck.
SV Laurie Anne
1988 Brewer 40 Pilothouse