Am I doing something wrong?

I'm platinum elite and I'm noticing repeatedly that platinum does not get called to board after diamond and board-first. We're all lumped in together with zone 1. When I asked the agent that scans your boarding pass, she repeated the verbiage of Diamond, board first and military...pretty annoying.

If that's the case, then platinum is useless. You could just buy a bag or be gold with a free carry-on and be zone 1 just the same.