When content doesn't seem to be tracking properly for some of your projects, you need to start taking a look at what SCORM traffic is being sent to the LMS and compare that to the results you are seeing. The key step here is obtaining a full log of the communication between the project and the LMS. With some LMS systems you can get this log for each login. A good example of this is the debug log in SCORM Cloud. However, most LMSes won't provide this information. Fortunately though dominKnow | ONE courses can provide debugging details.
Take a look at this ScreenCast to see how you can turn debugging on for your course during your indivdual launch of the content. The example is using Google Chrome, but other browsers have similar options.