recently i jumped from Maya 2011 to Maya 2013
the post infinity "cycle" in 2013 behaves differently than in 2011, does anyone know this is a fact, or could anyone spare some minutes to share with me which setting i have wrong in 2013

in 2011
i set for instance a translateX key on a sphere
frame 1 = 0
frame 151 = 50
than add in graph editor a post infinity cycle on it
doing this the sphere would be on frame 301, 451, 601 etc always exact on position translateX = 50

but now in 2013
at 301, 451, 601 it is always on 0 instead of 50
on 300 it is like 49.3, aswell on 450, etc, so it is never exact 50 in its cycle

i checked and unchecked many things in my Maya preferences, but nothing worked....,even tried importing my old maya 2011 settings into 2013, still this keeps happening,

any one a way of solving this.....

thank you for your time....