Strange Packet (invert ip)

Zeek
1

1095628174.157851 IP (tos 0x0, ttl 117, id 62764, offset 0, flags [none],
length: 40) 211.91.135.39.80 > x.x.x.x.52510: S [tcp sum ok]
3738538976:3738538996(20) a
ck 1775556062 win 8760

but bro09a5, event this :

1095628174.157850 WeirdActivity
bad_TCP_header_len x.x.x.x/52510 > 211.91.135.39/80

Note, these two have *different* timestamps, which means they refer to
different packets.

    Vern