You know, I prefer this as canon for one reason;
1. It implies that Sydney is actually just joking most of the time. She's got a persona of being a flaky comedic character, but it's not 100% true. She plays it up for humor, but she can also get serious when the time calls for it. Sure, it's somewhat true, she is extremely ADD, is clumsy, and a gigantic nerd on top of it, but she leans into those traits for a laugh which is always an interesting personality trait to me.