Oil shows fuller than it is on sitck

Oil shows fuller than it is on 92 ford areostar 3.0 way over the full mark. I let some oil out, got it to the full mark, drove it, then it was showing way over the full mark again. Thanks

And at one time it was always needing to add oil about two guarts a week depending how much driven. Any way you could not drive it far without adding a quart. And never could see where it was going. No leaks on ground anywhere. Then all of a sudden it stopped. Normal driving checked oil it was full. And then regular driving checked oil it was way to full.

Let some oil out of the oil pan, got it back to the full mark, and then again some normal driving for a week or more, checked oil again, way to full. Meaning to full 1 to 2 quarts to full. Strange where was all that oil going, now I wonder if all that oil added was still in the engine. Any help please thanks