When the three friends meet Deepa in the hotel lobby, they claim to be staying there since a week. However, as per earlier scenes and Akash's black eye, they have met Deepa in the club during Koi Kahe song just couple of days ago. The very next day after Koi Kahe song, Akash breaks up Sameer and Priya, and hence take Sameer to Goa.
When the guys are talking on the fortress ruins in Goa Sid refers to a ship that he is watching about to go over the horizon. The clip clearly shows a ship which is moving toward them, not away.