Ernie,
I agree that this should be fixed in GE, but I thought I would post how to do it manually, as this might provide insight for them.
I did the work on your KMZ. It can be done on the GPX file, but it takes a couple extra steps. I will list the general steps.
After importing the XML data,
Highlight the Lat, Lon, and Ele columns
Copy and paste into a new excel file
Swap Lat and Lon columns
Save as csv file
Open csv in notepad
Copy and Paste into Standard path format