If my reader delivers responses too quickly, LLRP Commander will display them all in the list, but they'll have exactly the same timestamp. No matter which one I double-click to display, they all show the same message (one of the messages with the same timestamp). For instance, I might see this in the list:
2011-Nov-17-11-40-44-890 READER_EVENT_NOTIFICATION
2011-Nov-17-11-40-44-821 READER_EVENT_NOTIFICATION
2011-Nov-17-11-40-44-821 RO_ACCESS_REPORT
2011-Nov-17-11-40-44-750 READER_EVENT_NOTIFICATION
Note that the middle two messages have the same timestamp (even through they certainly weren't sent at the exact same millisecond), and double clicking either one of them brings up the RO_ACCESS_REPORT.
I've worked around this on the reader by introducing a small (10ms) delay before sending each message, but this is not ideal.