I found the Spank/Fratelli tape to be very low tack, and it tended to unstick itself. Last pair of rims I did I just used some random 3M waterproof tape. It was a lot easier to apply and is holding up great.
What you need to do in 2019 is the following:This tent is very old but its an awesome tent, I've contacted Macpac for a replacement fly coz they still make the tent all these years later but no response.
Maybe a temp fix will work for a couple of nites.
Did you call them?