Carton Cartonization standard

Hi,

i'm setting cartonization JDE 9.00.

I've two problems.
1) My set up doesn't mixed carton. I've two items with the same dimension group (SMALL) but i'm not able to put them in the same carton.
example
1 ea of item1
1 ea of item2
in P460131 SMALL std pack 5 in C3
but the result is
item1 in C3 number 1
item2 in C3 number 2
I would like to have item1 and item2 in C3 number 1.
What do i set up?

2)
i've 3 different carton C1, C2, C3 for item1.
C1 std pack 10
C2 std pack 5
C3 std pack 1.
If I order 17 ea of item1, i would like to carton reccomendation: