Which is better?
The protocol was signed last week after all punch list items were fixed up.
or
The protocol was signed last week after all punch list items had been fixed up.
Which is better?
The protocol was signed last week after all punch list items were fixed up.
or
The protocol was signed last week after all punch list items had been fixed up.
The protocol was signed last week after all punch list items were fixed up.
This is not wrong. But it is not as clear as it could be.
Using the same, simple past tense - was and were - for both parts of this statement needlessly obfuscates the order of events (clearly indicated by the use of the word 'after'). The protocol could only be signed after all the punch list items had been fixed up.