I’m closing out that other thread to keep this discussion centralized.
I tested this issue with my sample feed, and the option in the Calendar Builder is working properly.
In the same iCal data you posted above, there is nothing for LOCATION. As I noted above, the Map Source selection only applies to LOCATION. I think we have not quite gotten to the source of the issue you’re experiencing. Please fill out the Support Request Form and provide your complete System Report so I can troubleshoot this further outside of the forums.