SEE SCREEN SHOT - MXISO shows "Subsequent Information" which shows that this chargeback was actually 2 cbks that were submitted together.
In MXISO you can see that there are 2 by going to Daily Cbks Report and then after clicking on the chargeback there is another link that says "Show Subsequent Information" - once you click there you see both cbks
MXM does not have the ability to drill down into the cbk to see the other cbk - merchant was concerned because she was debited twice, but only saw one cbk in MXM. This looks to be working as designed, so i did not submit as a bug.