If the grease you used is oil-based, then that's bad. You need to clean that off thoroughly, from o-ring and from the two channels it sits in, and then use the right stuff. Here's the hows and whys of it:
www.troublefreepool.com
My pump lid has the same ridges. There are always a few bubbles in it. Unless they get worse and actually build up over pump runtime, you can ignore them. I don't even know if mine go away eventually or not. Non-issue.