this thread will never end, sadly. But, as I do know, to answer your question/statement, allow me....
You are correct in your first assessment of the myth. In fact, few cross dressers are gay. This fact is clearly reflected on this forum. It makes perfect sense as gay men are attracted to men.
You are wrong in your second aeeseement. Most cross dressers ARE straight. This fact is also represented well on this forum.
You are also wrong in your statement that "most" cross dressers are bi. The correct answer is "some" cross dressers are bi. Your conclusion can not be reached based on the facts in evidence here or in science.
I hope this clarity helps you