Matching Drag&Drop Problem

Hi.

Have a small Problem with matching drag&Drop.

If the answer is the same for 2 Question than it shows wrong when  you are not choose the one from the correct column. exp.

Test1               A

Test2              A,B,C

Test3              A,B,C

Tst4               C,B,A,

Test5             C

So for Test 2 and 3 there are the same answer but later in the Quiz when the answers shuffeld you can choose the right answer but it shows wrong.

If the answer is not from the right coliumn than its incorrect.But how to do this?

greets Klaus