I think the 360million number is correct. The 8K says that series B is convertible to 80% of the OS. That does convertible to 80% of the current OS, not that it should equal 80% of the OS after it is converted.
At least that is how I read it.
Considering Tom owns 100% of series B, I think it is just a safety measure in case of some type of takeover. It would be nice to have a PR to explain some of the details in the 8K though.