For a keyboard that aims to the title of "Scientific", isn't it weird to offer the "zero" key after the "9" instead of its natural (mathematically speaking) position before the "1"?
The original Dvorak layout had 0 positioned on the right index finger (where 7 is on Qwerty keyboards). The layout of the numeric keys on what passes as a "Dvorak" layout today was apparently determined by the ANSI committee for... reasons.