Sorry. "I am guessing TPE is like HKG and treated as an int'l destination for transit purposes" sounded like you were doing TWOV.

By the way, it's Airline Ticketing 101 that if you buy separate tickets to construct your own transit even on the same airline, the airline is not obligated to help you out if you miss the second flight due to delay of the first. They might nonetheless help, but if they do it's just being gracious and you can't count on it.