RTV Plugging Holes in Cylinder Head

While adjusting valves, I noticed that someone plugged several holes in the cylinder head. You can see two of them in the attached picture - red arrows point to them.

These holes are NOT covered by the valve cover. When the engine is running the RTV rises a little bit as if pressure is trying to push the RTV plugs out. At this point I can see the sides of the plugs and can tell they are made of red RTV.

Why would these holes be plugged like this? Is there a better way to plug them? Could this be causing the oil leak I have in the head gasket above the #1 cylinder?

Thanks

Those were ports for the "clean air" system. Another member recommends:

"Just tap those ports for a pipe plug. I like to use "pressure plugs" on stuff like this because they'll sit flush. They are the same as a pipe plug but have a hole for an allen wrench instead of a raised square to tighten them with." Ed

Nice!.
Now that I know what to look for, I see several posts on the topic like this:
kzrider.com/forum/2-engine/599546-clean-...stem-delete?start=20