I have 2 helpful flags in Stack Overflow profile. When I click on helpful flags link am not able to see any information of the target page. Why is it so?
My Profile Page,
My Flag Summary
From my experience (don't have the reference):
It is because they were flags on comments. The only flags shown are on questions/answers. I think it is kind of a bug.
You do not have the 'Citizen Patrol' badge which is given for first post flag, so it makes sense they were flags to comments.
Also, I just found a reference: http://meta.stackexchange.com/a/126156/209901
Just discovered that you can see your flag history, even whithout any accepted flag, in: