Hi, Dante-
Ah, the joys of using globus again... But I did manage to wrangle the data, yes.
I think what is happening here is related to a bug fix from early April, for 3dClusterize on the command line for the particular case of a 1-sided distribution when using the -1sided RIGHT_TAIL p=... syntax was used (the GUI was behaving correctly for this, though). That case related to the F-stat, but the Chi-sq distribution you are working with is also 1-sided.
Sorry about that, but the current results should be correct.
--pt