Hi @GemmadaSilva Welcome to the forum 
I know with the first part you mentioned there is a current bug with nesting elements
Which i think maybe related to your issue: SOLVED: Gallery and carousel image preview issues
The good news is this is due to be added in the next couple of releases: Roadmap – Bricks
With regards to the second part I also have this issue, It strange because I have got it set to one and remember coming across this issue. But now I cannot remember where the setting is to change it to 2 or 3 etc?
