It sounds as though you have conversation threads turned on in Thunderbird.
Thunderbird, by default, assumes all threads with the same subject line are in the same thread. This can be an annoyance, if you would like to disable threading view than follow the steps:
Step 1: Click InboxStep 2: Click View from the Top Menu BarStep 3: Click SortStep 4: Unthreaded (This should be checked/selected)
Step 5: Click View again from the Top Menu BarStep 6: Click ThreadsStep 7: Click Ignored Threads, (This should be checked/selected)
Let me know if that works!Pete.
Fabulous! Thank you!