Hi Jim,
If I leave the Intensity slider to its default ** everything looks the same when comparing 1clust with 1clust_order. But, if I put the Intensity slider to 9, then far fewer 1clust_order clusters appear, however the 1clust clusters remain the same.

I ask these basic questions because I was trying to use 3dclust on these clusters, but the table results were not what I would expect (talairch cluster coordinates all over the place in and out of the brain). So, I am trying to better understand what refers to what, and when and where the cluster formation criteria apply.
Any other thoughts would be much appreciated. Thanks.
Darren