> I want to use WinHTTrack in background copying some 
> sites using a little bandwith resources.
> If I set a small transfer rate (say 100-300 B/s) 
> sometimes it bypasses my request,erasing the number 
> and putting 100000 on it.

?? The option is replaced by '100000' ?
> From other side,if I limit max connections to a 
number 
> it will ignore the number.Setting Max connection by 
> example to 2,always shows me( and work with) 8 
> connections.

This is crazy - maybe due to an interface/DLL problem. 
Can you check the winprofile.ini file in the hts-cache 
folder of the project, and see which value is set 
for 'Sockets' and 'MaxRate' ? This is the value used 
for the mirror.