They’re not both “leftists”.
Liberalism is a right-wing political philosophy. It is pro-capitalist, propertarian, and its conception of equality is about everyone having the same “rights”—enshrined by a centralised “representative” government that changes every few years with supposedly democratic elections.
Its more “leftist” strain is social-liberalism—which is about mere amelioration of social inequality rather than doing anything about the causes. It’s also about a million miles away from left-libertarianism.
Left-libertarianism is a broad umbrella term that encompasses everything from anarchist communism to mutualism and agorism. I don’t use the term because it’s just too broad, and I don’t like some of the political perspective which have latched on to the left-libertarian label in recent years. They generally share a conception of society and economy that is radically more decentralised, and most of which propose some alternative to capitalist production and property.