Tutorial_e-Phys _ WaveClus

Dear Brainstrom team,
As I am new to Brainstrom, I was simply following the SpikeSorting tutorial. When I used the unsupervised spike sorting (like WaveClus), the new events did not automatically concatenated to the previous ones and all the previous Spike Channel xxs disappeared from the events. However, these events were added when I double clicked on the sorter and used the Save and Next button on the main Brainstorm window as you explained in the Supervised sorting section.
I wonder whether I did a mistake or this is a needed step even in the unsupervised sorting?
Thanks!

@MartinC @mpompolas ?