my program structure is 

LinPhone------TCP------KA_EDGE------UDP------KA_REGISTER------UDP------FS

KA_EDGE:all clients TCP connection is in this server

KS_REGSITER:all register info is process here

when User A want to use program,Linphone send SIP REGISTER to KA_EDGE by TCP(and  TCP is always present), and KA_EDGE send to KA_REGISTER by UDP.

when  FS want to Call A, FS generate SIP:

INVITE A@KA_REGISTER_IP

KA_REGISTER recive INVITE, lookup the register list, send to KA_EDGE

INVITE TCP_IP:TCP_PORT

Route:KA_EDGE_IP:KA_EDGE_PORT

and LinPhone recive that INVITE.

my question is:

LinPhone A and LinPhone B both register in KA_REGISTER.

FS send INVITE:

INVITE B: KA_REGISTER_IP

and KA_REGISTER lookup correct，send to KA_EDGE

INVITE TCP_IP_B:TCP_PORT_B

Route:KA_EDGE_IP:KA_EDGE_PORT

but KA_EDGE is not correct.sip is correct, but KA_EDGE send the INVITE to A' TCP connnection

INVITE TCP_IP_B:TCP_PORT_B

Route:KA_EDGE_IP:KA_EDGE_PORT

Someone had this problem?Is this a bug?