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To ensure he reaches the city before the ship departs, he will appear one day earlier, but he will be weaker and without the Phantom ability.
The Phantom ability isn't a problem – he doesn't know how to use it.
Added 3 minutes later
He sailed to the Orcish castle, buying troops on the 4th week, without encountering the Necropolis – as expected, he didn't manage to capture the castle.
He got lucky! In the 1st version, the Necropolis would come with fifty high-level Vampires plus hordes of skeletons. With the army you have for the Orc, he wouldn't have been able to reach it.
Added 53 seconds later
In the updated version, is the bug fixed where the hero starts the 5th map at level 1?