3300MP vertical sync

Hi, new here.    I bought a 3300MP projector and connected it through the DVI port.   I noticed I can run it at a refresh rate of 85 Hz at 1024x768, but according to the online 3300 MP specifications page here, that is not a possible combination...

As you can see on the last table near at the bottom of  http://support.dell.com/support/edocs/acc/3300mp/en/specs.htm , XGA resolution on digital "V. Frequency" only goes up to 75 Hz, but according to what the projector shows when it finds a signal, I see text that says something like "1024x768 85Hz DVI".  

Anyway, just wanted to know if it is actually running at 85 Hz vsync, through DVI, and not something like 75 Hz, and that the specification page here is thus erroneous or not updated.  Thanks.