This is the first time I've used banana plugs and I've been unable to find an answer else where. I have two different types of banana plugs, Deadbolt plugs by Sewell Direct and basic ones from Monoprice. When I connect them to my speakers (Paradigm surround 1 and center 1) they do not fully sink into the post but leave a small amount of the plug exposed. I can hear and see that there is a wall in the post the prevents the plug from sinking any further, is it then expected that the plugs do not sink all the way and become fully flush with the post? Thanks!