there are 4 semesters for basic sciences...I'm in the 5th. I'll be done in December. Its also because our semesters are about 6 months.
Also, they are numbered differently. You see, if you start in 2yr 1st sem of premed and finish 3 yrs, you get BSc. Health sciences degree from Manipal University. So they call is 1st sem BSc. Confusing? Yes, well..

the premed though is a waste of time. they learn basic algebra, what is a simile, and how to eat healthy. Those premeds are bored out of their minds! Out of the 2 yrs of premed, the 2nd yr 2nd sem is the only one that prepares you somewhat for the rigorous curriculum.

Personally, I'd recommend that you take premed courses back home and come here for Basic sciences. Or atleast, take the classes that are taught the first 3 semesters of basic sciences and join here for the rest. But thats just me...