[quote=@CirusArvennicus]
Not even within a big group, but even between two people, yknow? Most posts reach into the past but also continue to progress things. You elaborate on the past, even as you write the future. 
[/quote]

Yeah, it is unavoidable. I find it kinda painful, because you would never write a story like that, but the only solution would be to work together, instead of typing in turns. But that is difficult in the extreme.