Checkmarks Error

I have a PDF file where there are checkmark boxes. You are able to select/deselect all checkmark boxes without effecting other checkmark boxes. However, in Kami when selecting a box it will take the checkmark away from another box. This being the case, I can not check off all boxes which is what I am trying to do.This does not happen in other PDF viewers with the same file. I believe it may be do to the text format or line breaks?