The Hoops were already two goals ahead with efforts from new Bhoy Dedryck Boyata and Stefan Johansen when they were awarded a spot-kick with 12 minutes remaining.
The Norwegian midfielder, who was felled in the box, grabbed the ball to take the kick, but substitute Griffiths snatched the ball from him before having his shot saved by goalkeeper Gunnar Nielsen.
It brought back memories of the League Cup Final win against Dundee United at Hampden in March when James Forrest and John Guidetti argued over a penalty before the former’s spot-kick was pushed away by Radoslaw Cierzniak.
Deila said: “It should be very clear – it is Leigh Griffiths who takes the penalties. That is something we have to get out of the way. We can’t have it like this.
“That is, hopefully, the last time that we see that because it is nothing about being professional and being a team, because we shouldn’t fight about a penalty.
“It is very clear who is going to take the penalty and that is the way it is going to be in the future. The taker gets extra pressure and everyone knows that when you have a penalty, the longer you wait, the chances to miss get bigger.
“I don’t know why Johansen did it, I haven’t asked him, but 3-0 is a much different result than 2-0.
“But 2-0 is a good result. We had chances to win more, but we were not more effective enough.
“I am disappointed that we didn’t score goals, but good that we had a clean sheet and we have a very good chance to make the next stage.
Deila revealed that Gary Mackay-Steven injured his groin in the warm-up, which led to him being replaced by Forrest.
He said: “I am very proud of my team, it was a very good performance and a great defensive display.
“We could have scored an away goal, we had the chance and we were unlucky. I was disappointed that we lost a goal just before half-time.
“But I believe we can get a good result at home, I am confident. We have one game left.”