Okay, so when I gave you those initial relative paths, they were based on the form schema you pasted in XPaths for.
This form schema is different, and the relative paths are different.
Is employee a child of expense report? If so, the name would be
../../my:employee/my:name
You can modify these directly in the mapping file if you wish. I'm attaching an updated mapping that should have the correct XPaths for these fields.
That being said, one way you can figure out the relative paths is to act like you are going to add a rule to the repeating group in InfoPath. For the condition, select the higher level field you need the relative path to. Then, change the first box to "the expression" and InfoPath will show the relative path in the text field next to the first drop down.