Strange behaviour with File Upload scoring

Hi, I'm facing some really strange problems while scoring File Upload questions... It seems that this problem occurs if you change the default Max Score of the File Upload Question. (Might also occur in different cases, seems quite inconsistent but you can test it with this) After scoring the File Upload Question you get incorrect score to your results page. See picture -> https://dl.dropboxusercontent.com/u/64534703/quizresults.png. In this picture you can see that after setting the score value to 5 it returned 6 as a result. In some cases it can also decrease the value with 1, or round the number to the closest end number (4 = 0 and 6 = 10). It looks like that the problem only exist on this result page because you are still able to see the right score percent in the Lessons Overview while browsing the course. Other question types are working fine so it seems that the problem is with the quizfileupload module... Any ideas how to fix this? I have tested this in my on environment which is running the latest version of Opingo and also in the demo platform which running the 1.19 version. BR