argus 3 not combining flows?

[MN]

Hi - I suspect that I've just missed something fundamental...

With Argus 3.0, our flow files are 3 times the size of Argus 2.0.
It looks like Argus is not putting flows together.  I've included
one example below (with IPs replace for privacy reasons).

Our argus.conf file on this sensor is as:

ARGUS_ACCESS_PORT=0
ARGUS_DAEMON=yes
ARGUS_DEBUG_LEVEL=0
ARGUS_FILTER=""
ARGUS_FILTER_OPTIMIZER=yes
ARGUS_FLOW_KEY="CLASSIC_5_TUPLE"
ARGUS_FLOW_TYPE="Bidirectional"
ARGUS_GENERATE_APPBYTE_METRIC=yes
ARGUS_GENERATE_JITTER_DATA=no
ARGUS_GENERATE_MAC_DATA=yes
ARGUS_GENERATE_RESPONSE_TIME_DATA=no
ARGUS_INTERFACE=eth1
ARGUS_MAR_STATUS_INTERVAL=60
ARGUS_MONITOR_ID=`hostname`
ARGUS_OUTPUT_FILE=/logs/argus.out
ARGUS_PID_PATH="/var/run"
ARGUS_SET_PID=yes

(all flows tcp)
[...]
05:50:05.5,05:50:05.9,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:50:15.5,05:50:15.9,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:50:25.5,05:50:25.9,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:50:32.0,05:50:35.9,10.10.197.51,2855,<?>,1.11.12.13,7227,4,3,240,612,CON
05:50:45.6,05:50:45.9,10.10.197.51,2855,<?>,1.11.12.13,7227,1,1,54,58,CON
05:50:55.6,05:50:55.6,10.10.197.51,2855,<?>,1.11.12.13,7227,1,1,62,58,CON
05:51:06.5,05:51:06.8,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,195,58,CON
05:51:15.0,05:51:16.0,10.10.197.51,2855,<?>,1.11.12.13,7227,3,2,192,195,CON
05:51:25.7,05:51:26.1,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:51:35.7,05:51:36.0,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:51:45.8,05:51:46.1,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:51:55.8,05:51:56.1,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:52:05.8,05:52:06.8,10.10.197.51,2855,<?>,1.11.12.13,7227,4,2,309,116,CON
05:52:25.9,05:52:26.2,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:52:35.9,05:52:36.2,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:52:45.9,05:52:46.2,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:52:55.9,05:52:56.3,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:53:06.0,05:53:06.3,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:53:16.0,05:53:16.3,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:53:36.0,05:53:36.3,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:53:46.1,05:53:46.1,10.10.197.51,2855,<?>,1.11.12.13,7227,1,1,62,58,CON
05:53:56.1,05:53:56.6,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:54:06.1,05:54:06.8,10.10.197.51,2855,<?>,1.11.12.13,7227,3,2,257,116,CON
05:54:16.1,05:54:16.4,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:54:26.2,05:54:26.5,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:54:45.7,05:54:46.6,10.10.197.51,2855,<?>,1.11.12.13,7227,3,3,192,249,CON
05:54:56.2,05:54:56.6,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:55:06.3,05:55:06.7,10.10.197.51,2855,<?>,1.11.12.13,7227,3,2,257,116,CON
05:55:16.3,05:55:16.6,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:55:26.3,05:55:26.6,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:55:36.3,05:55:36.3,10.10.197.51,2855,<?>,1.11.12.13,7227,1,1,62,58,CON
05:55:56.3,05:55:56.6,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:56:06.3,05:56:06.6,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:56:16.3,05:56:16.6,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:56:26.3,05:56:26.7,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:56:36.4,05:56:36.7,10.10.197.51,2855,?>,1.11.12.13,7227,2,0,116,0,CON
05:56:56.4,05:56:56.7,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:57:06.4,05:57:06.9,10.10.197.51,2855,<?>,1.11.12.13,7227,2,2,116,116,CON
05:57:16.5,05:57:16.9,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:57:26.5,05:57:26.8,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:57:36.6,05:57:37.0,10.10.197.51,2855,<?>,1.11.12.13,7227,2,1,116,58,CON
05:57:46.3,05:57:47.2,10.10.197.51,2855,<?>,1.11.12.13,7227,3,3,192,249,CON
05:58:06.4,05:58:07.0,10.10.197.51,2855,<?>,1.11.12.13,7227,3,2,257,116,CON
[...]

Any ideas?
- mike