F100 CREW LNDG YYZ ARE GIVEN A CONFUSING CLRNC FOR AN ILS APCH TO RWY 23.

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IT WAS MY (FO) LEG FOR THE FLT FROM ORD TO YYZ. AS WE APCHED YYZ; WE WERE VECTORED OFF OF THE WATERLOO ARR FOR RWY 23 ONTO THE DOWNWIND PORTION AND TOLD TO EXPECT THE ILS FOR RWY 23. WE WERE CLRED FROM 8000 FT TO 6000 FT. ABOUT THE TIME THE FLT CTL COMPUTER ANNUNCIATED ALT CAPTURE; THEY INSTRUCTED US TO DSND TO 4000 FT AND SLOW TO 190 KTS. I VERIFIED 4000 FT WITH THE CAPT AND KEPT THE ACFT DSNDING. 4000 FT MADE PERFECT SENSE AS WE WERE AT 6000 FT BUT PAST THE ARPT ON THE DOWN WIND. THE SPD MADE SENSE ALSO AS WE WERE WITHIN 10 MI OF THE ARPT AND IF THEY WERE GOING TO DSND US ANY LOWER THAN 4000 FT; WE HAD TO BE BELOW 200 KTS IN REGARD TO THE 3000 FT AGL (10 MI) 200 KT CANADIAN SPD RULE. DSNDING THROUGH 4700 FT MSL; THE CTLR TOLD US WE WERE ONLY CLRED TO 5000 FT; AND THAT WE SHOULD NOW DSND TO 4000 FT. LATER; WE WERE GIVEN A STRANGE CLRNC BY THE SAME APCH CTLR 'FLY HDG 210 DEGS; CLRED TO INTERCEPT THE ILS FOR RWY 23; 170 KTS TO TXWY XRAY.' I ASKED FOR VERIFICATION AS I DIDN'T KNOW IF WE WERE ONLY CLRED TO INTERCEPT THE LOC; OR IF WE WERE CLRED FOR THE APCH. WE WERE TOLD THAT IT WAS AN APCH CLRNC. ALTHOUGH SOME OF THE CTLR PHRASEOLOGY WAS CONFUSING TO US; THE CLRNC TO 4000 FT WAS VERY CLR TO BOTH OF US. SUPPLEMENTAL INFO FROM ACN 573708: ON ARR TO YYZ FOR RWY 23. PASSING 6200 FT MSL WE WERE CLRED TO DSND TO 4000 FT AND SLOW TO 190 KTS. THIS WAS SET BY ME (THE PNF) AND CONFIRMED BY THE FO/PF. PASSING 4700 FT; APCH CTLR SAID WE WERE TOLD TO MAINTAIN 5000 FT BUT NOW DSND AND MAINTAIN 4000 FT AND SLOW TO 190 KTS. NO FURTHER COMMENTS WERE MADE OF THE INCIDENT. APCH HAD ONE FURTHER CONFUSING INCIDENT. ON APCH; WE WERE CLRED TO TURN TO 210 DEG HDG; INTERCEPT ILS AND MAINTAIN 190 KTS TO TXWY XRAY. I HAD TO QUERY IF THIS WAS CLRNC FOR THE APCH OR TO INTERCEPT THE LOC. IT WAS APCH CLRNC. NONSTANDARD TERMINOLOGY.