Oh sorry, I thought your complaint was about having to phrase things as sentences. Yeah, Siri is pretty stupid about inferring that the number after hours is minutes.
Parsing time related stuff in general seems to be an issue. "Set a timer for a minute fifteen" makes an alarm named "Timer" set for 3 PM.
But if you say "Set a timer for a minute fifteen seconds" it works fine.
Curious if anyone else can duplicate the "a minute fifteen == 3 o'clock" issue or if it's somehow hearing me wrong.