I'm a little confused... can someone help?

Well, I am a little confused with a couple of things about BTPA. Here goes, I hope someone can help.

I last saw this film 6/7 years ago, when I was like 14 and I recently bought a VHS copy from a car boot sale and watched it. One of my "questions" was about the nurse, but it seems that there was already a topic and I know now that it is the same character from TPA.

But when Captain Mike, Celeste, Wilbur, Dr Svevo and his team are in the Gym, they have just come from the engine room where the survivors were taken out via an escape hatch. Then due to an explosion they find the nurse, and two other survivors. My confusion comes from the following:

1) The salvages and "paramedics" are still in the stern area of the Posedion, but the Doctor and Nurse (from TPA when Dr Scott persuades them to go aft) are leading a group of passengers towards the bow - how did the nurse end up at the stern? The corridor that the doctor lead them down was flooded when Dr Scott went to look for Robin. Plus the Nurse couldnt have passed as the group (less Dr Scott and Susan) remained in the area for the 15 minutes promised by Dr Scott to find the engine room.

2) The group of passengers being lead to the bow by the Doctor are all wearing night clothes/dressing gowns etc, so how come Mazetti and Susan are in the evening dress as if they had been to the New Years Eve party. But again, no one apart from the original 10 never left the ballroom.

I may have gone a bit too far while watching, but if it was a different producer and director making a sequel I could understand, but Irwin Allen produced TPA and I would have thought that other characters, say Engineers or more people from their cabins would have been found enroute to the Pursers Office.

Sorry for going on, just that I am confused by it! If someone would like to offer some comments on the matter I would be grateful.

Thanks,

Liam

"Jesus Christ, what happened?"
"We've turned over..."
'The Poseidon Adventure'