[Are there other meanings to the Satan pentagram?]

It is also used as a Masonic symbol, which is found in multiple places, and the Freemasons (33rd degree and up) are a satanic cult. Those below the 33rd degree are the goyim who have no idea what's going on at the top. They actually think it's some kind of do-gooders club.
Everything having to do with the Freemasons - from the White House, the Pentagon, anything having to do with the government, including medals of honor which the government dispenses, have some kind of Masonic symbol on them, even the satanic pentagram.