I agree with you. All of the contentious moments came at important times.
We were dominating the start of the match at their place when an offside goal was allowed to stand which changed the complexion of the rest of the half. Our disallowed goal would have made the score 3-1 and given us a vital away goal, meaning 2-0 would have been enough for us in the 2nd leg. Our wrongly disallowed goal last night would have made it 2-0 at half time and got their nerves jangling more.
Can't remember what stage the game was at when we should have had the penalty at Anfield but that would have potentially been another away goal.
Of course football doesn't exactly work that way and if the result at their place had been different, then both teams would have approached last night's match differently but those incidents had a huge impact on the result. Having said that, I thought they were just about the better team over the 2 legs but those decisions certainly shaped the tie.