For a complex case, when you need to get one guaranteed from the list, the second from a random list, you need to do the following:
Make 2 "capsuled_items"
1st list - "Guaranteed Items" with chance 100%. can use for items count = 1 Guaranteed
2nd list - "Random Items" -many items to recieve 1 from list
extractableCountMin = 1
Mobius
L2Emu