I always have less packets sent than received. I would be concerned if I were you. Someone may have placed a trojan horse on your system which is being used to spy on your system. Run an antivirus to make sure. Download some program to view the number of bytes transmitted from/to your system instead of only monitoring the number of packets. If more bytes is being sent out than being received, you are most likely been hacked. On the other hand, if you are sending less bytes than receiving, the greater number of sent packets may just mean that the packets are lost in transmission and that they are being retransmitted.