In the quiz results table under "Item analysis", each answer option who has a formula inside and was checked by at leaast one student is doubled (Please see attached screenshot).
We know the reason: The same formula in the answer option is saved one time rendered (in quiz results) and one time not rendered by the TeX filter (questions database).
$($) *formula* $($) (not rendered, in questions database)
<a target="popup" title="TeX" href="/filter/tex/displaytex.php?*formula*" ... (rendered by TeX filter, in quiz results)
The quiz does not recognize this as the same answer option and doubles the answer in the table.
Did someone have the same problem before? Does someone have a solution?