SUPPLEMENTAL ACR LTT OVERSHOT ALT ON CLIMBOUT FROM UNCONTROLLED ARPT AND ALMOST DID IT AGAIN LATER WHEN DEPARTING SDF.

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ON DEP FROM 21O; EVV DEP CTL GAVE CLRNC TO 3000'; EXPECT 11000' WITHIN 10 MINS. RADAR CONTACT AT 1500' AND CLRNC TO 11000' GIVEN. CONTACT ZID GIVEN ABOUT 9000'. DUE TO RADIO TFC; CONTACT MADE AT 10600'. THEY WANTED TO KNOW WHY WE WERE ABOVE 10000'. THEIR AIRSPACE STARTED AT 10000' AND THEY HAD NOT CLRED US TO 11000'. THIS WAS FIRST INDICATION OF ANY BENDING OF THE RULES. ALL READBACKS HAD BEEN GIVEN AND ACKNOWLEDGED AND ALT ALERTER SET FOR CLRNC GIVEN. NEXT LNDG WAS AT LOUISVILLE; KY; STANDIFORD FIELD. ON DEP FROM THERE CLRNC ALSO GIVEN TO 11000' AND SET IN ALERTER. PLT AND I DISCUSSED THE CLRNC; BUT DID NOT QUESTION DEP CTL. WHEN HANDED OVER TO ATC; WE ASKED ABOUT CLRNC TO 11000' AND WERE TOLD AGAIN THAT THE SPACE ABOVE 10000' WAS THEIRS. SINCE WE CALLED BEFORE PASSING THROUGH 10000'; THERE WAS NO PROB AT LOUISVILLE. I DO NOT KNOW WHAT THE PROB WAS ON THIS DAY. IT IS THE FIRST TIME I HAVE EVER HAD ONE CTLR DISAGREE WITH CLRNC FROM ANOTHER CTLR. I ALSO DO NOT CLB ABOVE 1000' ANYMORE W/O CONTACT WITH ATC OR A QUESTION TO DEP CTL ABOUT THE CLRNC LIMIT. WHEN THE LIMIT IS ABOVE 10000' FROM DEP; THERE IS COORD BTWN THE 2 CTLRS BY PHONE. THIS SHOWS THAT EVEN WHEN BEING ALERT AND PAYING ATTN; YOU CAN STILL BEND SOMEONE'S RULES; ESPECIALLY WHEN YOU DON'T KNOW WHAT THEIR RULES ARE.