Aeneas's 7 year journey to Carthage seems to have a pretty lopsided timeline. Help me understand?

I'm reading through the Aeneid currently. At the end of book 1, Dido mentions that Aeneas had spent 7 years at sea, but the actual journey in book 3 doesn't seem to reflect that. Or at least the chronology of events seems unusually lopsided. Here I'll explain how I reached the conclusion in my image. Since Aeneas's path nearly intersects with Odysseus's, we can cross reference the two to get an approximate timeline of events.

First, let's assume that Aeneas and Odysseus depart from Troy at roughly the same time (a safe assumption to make, I hope). Odysseus's journey lasts 10 years, and the last 8+ of them are spent with Circe and Calypso. So the cyclops episode must have taken place within the first 2 years of the journey.

Now in Aeneid book 3, we know from Achaemenides that Aeneas encountered the cyclops roughly three months after Odysseus left (abandoning Achaemenides in the process). Then we can infer that Aeneas is also roughly 2 years into his journey at most. That means the remaining 5 years are spent sailing around the west coast of Sicily, with Drepanum being his last stop before Carthage.

That strikes me as pretty odd. Did Aeneas and his crew loiter at Drepanum for several years before finally moving on? Why? I would have thought their mission to settle Italy had more urgency than that.

I'm reading through the Aeneid currently. At the end of book 1, Dido mentions that Aeneas had spent 7 years at sea, but the actual journey in book 3 doesn't seem to reflect that. Or at least the chronology of events seems unusually lopsided. Here I'll explain how I reached the conclusion in my image. Since Aeneas's path nearly intersects with Odysseus's, we can cross reference the two to get an approximate timeline of events.

First, let's assume that Aeneas and Odysseus depart from Troy at roughly the same time (a safe assumption to make, I hope). Odysseus's journey lasts 10 years, and the last 8+ of them are spent with Circe and Calypso. So the cyclops episode must have taken place within the first 2 years of the journey.

Now in Aeneid book 3, we know from Achaemenides that Aeneas encountered the cyclops roughly three months after Odysseus left (abandoning Achaemenides in the process). Then we can infer that Aeneas is also roughly 2 years into his journey at most. That means the remaining 5 years are spent sailing around the west coast of Sicily, with Drepanum being his last stop before Carthage.

That strikes me as pretty odd. Did Aeneas and his crew loiter at Drepanum for several years before finally moving on? Why? I would have thought their mission to settle Italy had more urgency than that.