Hulu didnt do that. Thats the order they aired them on TV. It was a spring replacement, which usually struggle with a short first season. I think they probably aired their strongest episodes early trying not to get cancelled, then aired the second & third episodes produced later. It wasnt that big of deal & some stuff you would never notice if you werent binging. There were some jokes that crossed episodes out order, like one early episode Penny said she slept with her allergist the night before, then 7 episodes later she accidentally calls Max for 24 hours & he tells Dave he listened to her flirting with her allergist. Also didnt know Jane & Alex are sisters until they aired the second episode late in the season. Biggest thing was Dave living with Max for 7 episodes, then theres an episode about him moving in with Max.