At the risk of wading in on another thread about labels, I'll still throw my 2c in.
I really think that this is down to individual perception of the word 'transgender' and lack of understanding that it's an umbrella term for a wide range of people.
I'm a crossdresser. But that's just what I say, it fits me fine. I have no desire to become a girl full time, get surgery or legally change my name.
But I am aware that some people will call me a transvestite. And that's fine too.
Some people may even label me transgender... Also totally fine with me.
Do I refer to myself as transgender? No. But not because I believe it to mean 'transexual' - it's more to do with lack of specifics.
The only similar situation I can think of right now that serves as a comparison is Autism. Now referred to as Autism Spectrum disorder.
There are a great many diagnoses under ASD, but most people who don't know enough about it simply say 'Autism', where Asperger's or other specific would be more appropriate when referring to an individual rather than a group.
Which leads me to another point.
Transgender is fine if you are referring to a group of us, because no two of us are the same.
But on an individual level, I feel it is better to ask for individual opinion and choice of term.
Hope I made sense
xx