Random Words Being Marked as Unknown

Hey! When I read through a lesson a click on a word to mark it as unknown, more often than not a word at the beginning of the page will be marked unknown as well. I study Japanese and this happens on my chrome browser, but not on my phone. Any ideas?

After you open a lesson, click on the settings button (gear icon on the top right) and there you can disable “Auto LingQ creation”. That should solve your problem.