LingQ tells me I know 237 words in French

I logged in just now and the first thing I see is my French LingQ badge which reads “I know 237 words”…

For a moment I thought someone had hacked into my account or something…I checked on my profile page and my vocabulary page. I looked at all of my level 4 “Known” words, and turns out I only have 4.

What is going on?

You have probably read texts with 233 other words which you haven’t saved, and then clicked “I know all”. Those words you don’t save, but “know”, are of course added to your amount of known words.