That's the Status tab, you want the Configuration tab.
Mine shows:
Downstream
Max Traffic Rate 287500061
Upstream
Max Traffic Rate 27500061
Converting the bits/sec into megabits/sec:
287500061 = 287.5
27500061 = 27.5
This is about the top I see in a speed test on the 250/25 service.
The Hub 3 is DOCSIS 3.0 and you need the 4 or 5 to use additional DOCSIS 3.1 features, which I think might include more upstream capacity.
You could ask Customer Services if they can get you a newer hub.
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