Can someone remind me what the _1_0 at the end of Scene2_Slide4_Multichoice_1_0 means?

That's correct. For instance: 'Scene1_Slide2_TrueFalse_0_0' denotes the first attempt at a quiz and the first attempt at a question within that quiz. Subsequently, '_1_1' would signify the second quiz attempt and the second question attempt in the same session. The second integer is consistently 0 if only one attempt is permitted. Upon restarting a new session, it should reset to '_0_0', and repeat accordingly.

Thank you for confirming what I thought and explaining it some more Nedim!

One thing that is strange - in some of my data there are rare cases where, even though only one attempt is permitted, I am finding records for multiple attempts. Maybe it is just a glitch. For example, for one user there is a record of attempts for a question that goes from 0 to 13 on a question that was only set to allow one attempt. What's even stranger is that each response was correct, so I doubt she actually answered it fourteen times - the system must have just reported it that way:

Thanks for the suggestion Jose! I think this would be pretty difficult to even replicate in our own LMS because it happens so rarely, but I'll see if I can figure out what triggered this strange result. It's almost like the module kept trying to tell the LMS that the person passed the question. Like when you tell your child to wash the dishes 15 times thinking they might not have heard you the first 14 times, but, in fact, they did hear you all 15 times.