Is this a bug in gnu awk or am I doing something wrong?

[Stuart Hartley]

awk --version
GNU Awk 3.1.3
Copyright (C) 1989, 1991-2003 Free Software Foundation.

This is running on: cat /proc/version
Linux version 2.6.9-34.ELsmp (address@hidden)
(gcc version 3.4.5 20051201 (Red Hat 3.4.5-2))

Note: I get the same results on AIX TL9 and TL6.

cat /tmp/Steve.txt
id:name:SCSI_id:vdisk_id:vdisk_name:wwpn:vdisk_UID
0:Q1B_A0110:0:567:T2_UNXA0110_036:10000000C945B14E:
6005076801810082480000000000188D
0:Q1B_A0110:5:561:T2_UNXA0110_030:10000000C945B14E:
60050768018100824800000000001887
0:Q1B_A0110:6:562:T2_UNXA0110_031:10000000C945B14E:
60050768018100824800000000001888
0:Q1B_A0110:7:563:T2_UNXA0110_032:10000000C945B14E:
60050768018100824800000000001889
0:Q1B_A0110:8:564:T2_UNXA0110_033:10000000C945B14E:
6005076801810082480000000000188A
0:Q1B_A0110:9:565:T2_UNXA0110_034:10000000C945B14E:
6005076801810082480000000000188B
0:Q1B_A0110:15:566:T2_UNXA0110_035:10000000C945B14E:
6005076801810082480000000000188C
0:Q1B_A0110:22:546:T2_UNXA0110_011:10000000C945B14E:
6005076801810082480000000000093F
2:unxa0073:0:688:T3_UNXA0073_001:10000000C94FEC92:60050768018100824800000000000CBD
2:unxa0073:1:687:T3_UNXA0073_002:10000000C94FEC92:60050768018100824800000000000CBE
2:unxa0073:2:686:T3_UNXA0073_003:10000000C94FEC92:6005076801810082480000000000135B
2:unxa0073:3:216:T3_UNXA0073_004:10000000C94FEC92:60050768018100824800000000001979
2:unxa0073:3:63:DS8000B-
V803:10000000C94FEC92:60050768018100824800000000000C39
2:unxa0073:4:62:DS8000B-
V804:10000000C94FEC92:60050768018100824800000000000C3A
2:unxa0073:5:61:DS8000B-
V805:10000000C94FEC92:60050768018100824800000000000C3B
2:unxa0073:6:60:DS8000B-
V806:10000000C94FEC92:60050768018100824800000000000C3C
2:unxa0073:7:59:DS8000B-
V807:10000000C94FEC92:60050768018100824800000000000C3D
2:unxa0073:8:796:DS8000B-
V808:10000000C94FEC92:60050768018100824800000000000C3E

Type:
awk -F: '/6005076801810082480000000000135B/  { print $0 }' /tmp/
Steve.txt
Returns:
2:unxa0073:2:686:T3_UNXA0073_003:10000000C94FEC92:6005076801810082480000000000135B

Type:
awk -F: '/60050768018100824800000000001888/  { print $0 }' /tmp/
Steve.txt
Returns:
0:Q1B_A0110:6:562:T2_UNXA0110_031:10000000C945B14E:
60050768018100824800000000001888

Type:
awk -v id=6005076801810082480000000000135B -F: '($7 == id) { print
$0 }' /tmp/Steve.txt
Returns:
2:unxa0073:2:686:T3_UNXA0073_003:10000000C94FEC92:6005076801810082480000000000135B

Type:
awk -v id=60050768018100824800000000001888 -F: '($7 == id) { print
$0 }' /tmp/Steve.txt
Returns:
0:Q1B_A0110:5:561:T2_UNXA0110_030:10000000C945B14E:
60050768018100824800000000001887
0:Q1B_A0110:6:562:T2_UNXA0110_031:10000000C945B14E:
60050768018100824800000000001888
0:Q1B_A0110:7:563:T2_UNXA0110_032:10000000C945B14E:
60050768018100824800000000001889
2:unxa0073:3:216:T3_UNXA0073_004:10000000C94FEC92:60050768018100824800000000001979