This actually would make a lot of sense. My previous guess was the original version had spaghetti code (ex: lots of hard coding edge cases), and they tried to

This actually would make a lot of sense. My previous guess was the original version had spaghetti code (ex: lots of hard coding edge cases), and they tried to move it to a more standardized / maintainable code block that hasn't been fully brought up to speed. The guess was based on a interview video I saw discussing the various prototypes for the original iphone keyboard.