I had only single round with HR where I explained my experience and past projects. Very next day they told me they have enough number of candidates that they think they are strong for the position. I don't know how they did not know that a day earlier.

Complete trash. They asked me to lead out with my salary expectations, then said "that's too high". They didn't even counter offer, just "That's too high". Then during the interview to see if we could find mutual compatibility, they carefully avoided discussing any specifics and talked around answers. Easily the sleaziest interview I have ever had. EASILY.