Repeating nested tasks

I signed up for a Zoho account to use the nested and repeating tasks feature. I have figured out how to do one or the other, but I can't seem to do both. If I create a task and make it repeat, the option to create a sub-task goes away. If I create a task with a series of sub-tasks, there is no repeat option for the sub-tasks. I can go in to the original task and tell it to repeat. It says it has been updated, but it just reverts back to non-repeating. Help, what am I doing wrong?