As much as I would like my own sprint numbers below 30s to be that high, I know they are not and clicking in directs me to a friend’s activity while the other numbers are my own.
Either you connected your friends device account(s) on your Intervals account, either you’re using some third party app that mixes up things. If you used both accounts (Intervals or third party app) on the same device, you somewhere mixed up.
I did not connect my friends’ devices on my intervals account and have not used any third-party apps. I have a few folks in my Groups where we share data with one another.