Question

But on the spot I told them: 'Back, and quickly!

Answer 1

What motivates Odysseus's men to ignore his orders to leave quickly is 3. they want to eat, drink, and enjoy themselves before setting off on their journey.
They had been traveling the seas for such a long time, so when they finally got an opportunity to relax and unwind a bit, they did so. You can see in the excerpt above that Odysseus says that his men were "on stores of wine," meaning drunk - they wanted to feast and forget about the fact that they have to leave this island soon and venture on.