How should alerts be interpreted? hacker's_machine -> victim's_machine?

["Palula Brasil" <palula () uol com br>]

Ok! Alerts are workin fine. But indeed there is another problem.
Here is the problem: the alert file has these. 

[**] [122:7:0] (portscan) TCP Filtered Portsweep [**]
04/12-22:30:29.305031 x.x.x.x:port -> 38.119.49.39
PROTO255 TTL:0 TOS:0x0 ID:5901 IpLen:20 DgmLen:162 DF

and...

[**] [119:15:1] (http_inspect) OVERSIZE REQUEST-URI DIRECTORY [**]
04/12-23:14:22.648030 x.x.x.x:port -> 66.165.172.181:80
TCP TTL:64 TOS:0x0 ID:30828 IpLen:20 DgmLen:1452 DF
***A**** Seq: 0x3B8C6DA9  Ack: 0x7AAF4300  Win: 0x5AC  TcpLen: 32
TCP Options (3) => NOP NOP TS: 54649465 770359521

But the thing is that x.x.x.x:port is my machines IP and port. Looks like it's gone mad and is doing totally random 
port scans and http inspects on whatever machines.

According to snort docs, the correct interpretation for these alerts is:
hacker's machine -> victim's machines

Has my machine gone mad and is making victims out of a sudden? Home network ( -h x.x.x.x/x) has been defined, by the 
way.

Thanks! :-)