Hi Jocelyn, 

I think your point is very relevant, as I had some confusion between versions at the time. However, I'm pretty sure I had this problem with 22.12, but maybe it first happened using 22.05 and I reopened in 22.12 without rebuilding the ecf file. Out of interest, what caused the problem that you fixed in 22.12? Was it something to do with case sensitivity ?

In any case I will report to you if I get the same problem again - so no need to investigate the duplicate cluster problem further for now. 

Do you think the delete cluster problem might be related to the duplicate cluster problem? BTW I just restarted with "clean" and have the same problem 

Best
Martin