philips reg924.h redefinition

in byte registers ,it declares
sfr CMP1 = 0xAC;
sfr CMP2 = 0xAD;

while in bit registers it declares
sbit KB7 = P0^7;
sbit T1 = P0^7;
sbit KB6 = P0^6;
sbit CMP1 = P0^6;
sbit KB5 = P0^5;
sbit CMPREF = P0^5;
sbit KB4 = P0^4;
sbit CIN1A = P0^4;
sbit KB3 = P0^3;
sbit CIN1B = P0^3;
sbit KB2 = P0^2;
sbit CIN2A = P0^2;
sbit KB1 = P0^1;
sbit CIN2B = P0^1;
sbit KB0 = P0^0;
sbit CMP2 = P0^0;


Is it a error?

IDE-Version:
uv ision3 V3.30
C Compiler: C51.Exe V8.02


thanks