changes in 9 are cascading up
I watched a lot of videos about how if I arrange my desktop layout first, then go to tablet, that the changes I make to tablet WON'T affect the desktop layout, though they will cascade (not sure if I'm using the right word) down to phone.
But I'm changing things in tablet, go back to see desktop, and it's been ruined.
What am I missing, or what am I doing wrong? I didn't have this problem in 8.
TIA for any help. I'm literally at a standstill, as any edit I do changes previous work.