Test results not correct

I know this question was discussed some at the recent Lectora User Conference (by the way - great conference ), but I would like to have the answer clarified.We are using Lectora Enterprise 2005. This occurs in about 10-15% of the test takers. The user takes the test and we have it set up that they receive feedback after each question and then they get the test results at the end of the test. Well, the user will get correct responses on each question but when the test results display they failed with only 33% (generally) correct. Then when they start the test over the first half of their test answers are not there, but when they get to the second half of the test they are. So if they run through the test a second time and answer just the first half of the questions they will get 100%. They mentioned at the conference that this had something to do with cookie limits and Internet Explorer (which we use).Can someone clarify why the problem is occuring and how to fix it. 10-15% may not seem like a lot, but when you have compliance training and 3,000+ users taking the course/test it's a lot.Thanks,