As sure as one can be given that 'datasheet'.
The contact assignment should be the least of your problems. You can always check with an Ohmmeter (Multimeter in Ohm range).
Yeah I think you're right.
But I'm not so sure that I have a problem actually. And if I do, I think it can be tested easily.
The rating says 5v 300ma. I take that as meaning that when closed current shouldn't exceed 300ma, and when open voltage shouldn't exceed 5v.
(I'm using this as a two mode toggle)
In my case when closed the current is 200ma and voltage is 0 - no problem.
When open voltage is 5.7 and current is 0 - might be a problem, but I am confident that given the small excess voltage, there would be no arcing while in the open position and hence no potential for damage.
Damage could only occur in the transition between states, and that being said the power of any potential arc which may develop would not be greater than that given in their ratings.
So QA could be done by just flicking the switch many many times, not by waiting long periods of time.
Do you believe this assessment to be correct?