Since when are Socialists considered Classical Liberals?
It's not that the labels are charged, it's that they are nonsensical unless you look at them from a very narrow bespoke perspective, where "things I like" go on one side and "bad things" go on the other. Objectively (or even from any other biased perspective), it's rubbish.
Yeah, Libertarian is better. The first use of Libertarian was in the phrase Libertarian Communism. That, Libertarian Socialism and Anarchism are what the far ends of that bottom left corner is mostly about, although there is progressive liberalism, which is the more common moderate areas of that quarter.
They aren't. You flipped them, not sure if intentionally or by accident.