I agree with your observations... queen post bottoms are in tension, for long-span internal trusses w/o support under the tie-beam. It is my understanding that the purpose of the queen posts in those internal bents/trusses is to keep the long tie beam from sagging - similar to the function of the king post in a king-post truss. The collar tie would be in compression, keeping the rafters from sagging. I believe the design is different in the gable ends because it can be. If one can include support for the tie beam (in the gable ends or anywhere in the structure), then the whole structure will be stronger, over-constrained, and somewhat redundant. Now I think I'm being redundant.
What was your question exactly?
