That’s fine. Based on the year that this model came on the market (2013 according to the install manual copyright date) the Security+1.0 wireline protocol is most likely. I know that it advertises Security+2.0 but that’s probably referring to the wireless remote protocol and is consistent with other LiftMaster openers introduced around that time.
Yes, please do! Also it would be really helpful if you could captures some logs from the GDO blaQ while the gate is opening and closing and you are triggering it from the manual controls. You can see the logs on the device’s built-in web page, or see this post for tips on how to stream logs via terminal.