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You are right in that the gain at 80 MHz is clearly not 100.  Both the initial marketing points and the graph seem to agree on a gain⋅bandwidth of 45 MHz.

There does appear to be a slight kink in the gain curve at 800 kHz, but it looks like the gain is a bit below 100 there.  A gain of 100 at 800 kHz seems excessive given unity gain at 45 MHz.  Maybe they are trying to say the gain falls off faster than 1/f above 800 kHz.

I would certainly ask for clarification from TI before relying on any of these parameters.  Or, use a different amp with specs that don't contradict themselves.