You are right on. Some theories become facts as and when evidence is provided.Other theories stay as theories because, there is no evidence.
You don't understand the relationship between 'theories' and 'facts'.
Theories are models to explain the facts. For example, the THEORY of evolution is a model to explain how the FACT of evolution works. It is
a FACT that species change. It is a fact that species go extinct, it is a fact that new species appear.
The THEORY of evolution is a model to explain the mechanism of how this happens.
Just like Gravity. The fact is that if you have a brick, and drop it, it falls to the earth as a certain rate of speed. The 'law' of gravity
describes what exactly happens (32 ft per second per second).
The THEORY of gravity is a model to try to explain why this happens.