Sandi is insecure about herself.
Why else would she be so obsessed with proving herself as a capable athlete? One of her biggest berserk buttons in the show comes from whenever someone even SLIGHTLY stereotypes her gender, whether intentional or not, and she does not take being embarrassed well at all, as said by her in 'Dorkbusters', and even SHOWN in 'Everykid 13' when her voice for a podcast sort of thing gets mixed onto a video of Chopin, Ian's dog.
Ian is now a popular online filmmaker
He eventually dropped out of making it big in Hollywood, but with the rise of social media, guys like him are finding it easier to show off their content. He now aims to sign a deal with Netflix.