It's pretty easy to go online and understand what the "FTPPassive" key is (and why it's enabled by default). The firewall settings thing is a UI bug, if that. Those other toggles don't take effect when blocking all incoming connections is active. As such, it doesn't matter what the value for the other toggles is, so it resets them to the default (true). Perhaps a sharp point if you toggle firewall often, but not an outright security issue. My laptop has that systemuiserver preference setting there as well.

I think this person is a bit paranoid and reading a bit too much into things judging from their timeline.