Almost perfect – Timer+ · multiple timers Review

The app is great, I’ll give the app 5 starts except the button to add time to a running timer is greyed out and I cannot figure out how to make it work. Could anyone help with this? Other than that there is a bug (or feature?) that links two timers when changing their order and it is unclear how to manage this.
Review by RIc. G. on Timer+ · multiple timers.