Thank you MJ!
I did go ahead and make a companion video which shows the Wagon Transport at EDO when going to Southern Island Hideaway. Have a look! I didn't know about it at the time. There may be other secrets as well. Granzella is awesome.
I updated the OP as well.
The Granzella Dolphin Transport could be the reason behind those reports from PS Home users that play in the Hudson Dolphin Racing game indicating that their dolphins apparently were deleted from their personal Dolphin Room. Perhaps the dolphins were hired by people from the Granzella Dolphin Transport System to help people go from the Glittering Sands Beach to the Granzella Southern Island Hideaway. PS Home gets beyond being incredibly funny whenever it comes to ideas that match so well some of the so called "strange glitches of the system". HAHAHA !!!