The movie was likely to come out around 2010-2014
There are a bunch of teenagers, young adults at a summer camp of some sort. Things start to get weird when some of them seem to meet their doppelganger, Like these doppelganger came from a parallel universe. At the end, there was a fight between these people and their doppelganger.
“Cloned: The Recreator Chronicles” (2012) ?
https://www.imdb.com/title/tt1540005/?ref_=kw_li_tt
Close but not really, there were a bunch more young adults.
+1 (2013)?
https://www.imdb.com/title/tt2395385/?ref_=nm_knf_i3
Yes, that is.
Solved!