Candy exchange for rolled cash

The Zombie exchanging rolled cash for candy isn't taking the candy. Or the some candy isn't registering for him to take.

The 2 types of candy either dont show up for him to grab or both dont.

My Friend and I tried to put them in stacks of 2, individually, mix them up.

Not sure if its just rare types of those candies or not, but wanted to make it known to you guys just in case it is messed up