I cannot reproduce the issue.
The count is done on the value of a radio field type, which should be of the type array.
So if that is not the case, something else seems to be wrong that is causing this...
Can you give me (super) admin and (s)ftp access so I can take a look?
And tell me on what url I can see/reproduce the issue.
You can use the 'Hidden text' button in the forum editor to hide the confidential information.