Adding delays should create n-1 delays

Current Situation

When editing the properties of a Retry Instruction, the Max. Tries input field contains the number of tries (not retries) that the retry block will execute.
Clicking the Add All Delays link will create too many delays with the result being n+1 delays.
The first delay for a newly created retry instruction has a value of 0s. All added delays have a value of 1m.

Desired Behavior

When clicking the Add All Delays link, as many delays should be created that the result is n-1 delays.
The first delay for a newly created retry instruction should have the value 1m.