I have a feeling that lesbians exclude trans women because they are not women.... but the fact that most not "ladylike" is the icing on the cake of exclusion.
I have started complaining more and more - challenging organisations publicly and via email as to how on earth can they claim to be LGBT when the T is in direct opposition to the LGB. Time to up the ante and start complaining that academics are supporting stonewall and that such a hateful position is incompatible with continued employment?