Thank you very much for taking you time to reply.
…Yes, all very true.
It seems that this problem happens because of the cameras are linked to third comp via expressions (they are in different comps (Left, right and anaglyph preview.. preview has a camera that moves the cameras in two other comps)and for some reason when loading project file to a new project the render que doesn’t get the expression that is connecting preview and cameras in their own comps and therefore it is rendering them as if i would delete the parent camera and due to that the two other cameras would then be zeroed to “create a new camera” starting position and options.
db