Hi,
on new firmware DELETE button on Record mode dont delete whole STEP, it leaves instrument number as it was and you have to delete again step but on instrument input.
To walk around this you have to:
PS. But sometimes it works as charm, but only sometimes 
Same here on my new silver mini. I dont know why its just terrible. Delete needs to be clear the row.
also i cant change otaves i need to change the root note to low as possible to go c2.
Hmm interesting and anoying me. I work in trackers 36 years now….. i just have one another question(another topic i know)
Why C2 not C-2 as any trackers use 3 letters like: C-2 and C#2 so much better visuals…..!