mmm…it seems that you´re messing up things… :laugh:
let me make it a bit clearer…
the 16 tracks you get when starting the seq_v4 are not 16 patterns nor is this a “whole” pattern…
these 16 tracks are divided into 4 groups, each group consists of 4 tracks which is then called a pattern.
so when you save a “pattern” A1 = (group1->track 1-4) and load another pattern A2, your tracks A1(1-4) are now replaced by A2(1-4)…so is group2->track 5-8…group3->track 9-12 and so on…so by loading a pattern you will replace 4 tracks at a time on your chosen group.
if you , what i think you did, want to change back and forth between track1 to track4, this can be done by muting them, best with synced mute/unmutes enabled ((util./opt.)…but for now you can also save your “patterns” as A1,A2,A3,A4 and copy each wanted track to track1 and clear the other 2-4 after. before that, you should backup your pattern to an unused placeholder like B1 or so…so you can always return to where you´ve started, in case something goes wrong… 
Ok, thanks for this clarification ;D
Now I understand the basic way to operate. And have slight idea about the limitations.
For me it is quite weird, that I can’t apply mute/unmute -information anywhere and automate it? For example, I save 5 patterns - then arrange 4 different parts out of the 16 tracks. After a while I have messed first pattern and reload it while playing the song mode that includes the mute/unmute -information. When the song is ending I load the fifth “ending pattern” over one of the patterns and know that the mute/unmute automation will close the song as I have thought. This would make the whole process so much easier, as I could create the basic structure of the song and pretty much automate it - now playing live I could just add some flavor and mess with the tracks without the hassle of muting and unmuting.
I play in a band, where we have some other instruments and a singer, so I can’t just jam. There is a structure that we have to apply and I find it frustrating to keep up with it manually.
In the song mode, in the other hand, I can only apply patterns in a specific order? Well - I think I must go back to the lab. So difficult
I got my first children a month ago and had to take all my gear to my studio… Can’t just test and practice
Maybe I have to bring the SEQ back and use it with VSTs… :sorcerer: