Morgan had a 57:43 to ALP in August when everyone else was 53:47. They seem a bit... variable.
Morgan has a 1.5 point in-house Labor bias (so the 57-43 ALP was really a 55.5-45.5) but it also tends to seriously overstate mood swings in the electorate (at the introduction of the carbon tax essential was 55-45 LNP, while Morgan was 62-38). Morgan isn't a bad pollster, it's just that they are undoubtedly the worst to pick a single poll off of, you need their medium-term trend to tell a story that makes sense.