Transgender is not a mental disorder and being gay isn't a preference.
How is it in this day with so much information available, you stick with the stupidity of what was yesteryear wives-tales used as science?
If you want to know what misidentification is, you just wrote it. You misidentified every trans person out there from infant to adult.
Are there some trans people who are unstable? yes, of course but that may come from being misidentified in their youth.
Is trans fully understood? No. But your little thesis doesn't help, them or you.