folder permission changes when sharing task

Hi,

I am trying to share a task folder with four different people in outlook 2016.  I have set their permission level for that folder in the task area.  Two of the people are authors and two of the people are reviewers.

the problem I run into is when I am sharing the folder with all of them, it changes all their permission level to reader (view only)

Why is this happening?  Can I send it that way and go into the folder again after it is sent and change the permission level back to what I had firs set it to be.  If I am changing it after does it also change on their end.

Please help.

Thanks,

Jason