I'm sure this has to make sense in some way. I'm just wondering if anyone here know of anyone who may have written about it.
Per Atomic: It's a paradox - it doesn't have to make sense, in fact to be a paradox it shouldn't be simple but rather hard to believe. a paradox is a situation that leads to contradiction or cannot be reconciled with intuition.
There has been a huge amount of writing upon it - the wikipedia page "grandfather paradox" is a good starting place
and for a more philosophical approach http://plato.stanford.edu/entries/time-travel-phys/