No mate, you are not they only one having this problem. I am sick and tired of playing twice, three times, the same ranks... I lost 3 dog tags the last time, and those 3 dog tags only God knows when i am gonna get back since i svck and i got those for finishing at first place and being the most valuable player.
I started having this issue when the double xp weekend began, so i have been dwelling on ranks 24 to 29. I am pretty sure i could be rank 33 or something like that by now...
Seriously, this game has such potential but crytek seems to be only interested in the money they could earn from it, but "crappy game = no money". So, no, i am not buying DLC and no, i am not buying crysis 3.