I never knew Shumacker was a Captiano!
I can't understand why you were at 280 below 10000! Did ATC not go ape s**t? God, I have flown 255 at 9500 ft and been told off!
If you feel worried enough to tell all us then it's a problem. When briefing the approach make the call yourself and wait for him to approve!
Until then....try to keep your knickers clean!