Update Approval Decision Box

Can enhancements be made to the approval decision box. We use the approval process fairly frequently for items that are audited, and we need to retain the decisions and comments.

I have a large number of users that approve or approve with changes and then hit the "X" to close out, not realizing the "X" is actually recording a Reject decision.  I am also having issues with people accidentally recalling their decision.  This is causing quite a few headaches as people are insisting they have approved their items and the system is wrong. I am then having to take the emails they send me and upload them as proof of their decisions.