Problems with Addon

There are two problems I found:

1. error when adding addon: on the add a new food item screen, when selected an addon item from the dropdown list and click “add”, the addon items are not shown. I have to save the item and refresh only can see the items.

2. after input all the prices for different addon items, the values are not saved after published. Sometimes can, sometimes cannot.I am not sure if it is too many addon options or what is the issue.