I know the basics of Causal and Evidential Decision Theory but I am baffled by Timeless Decision Theory. If you could point me in the direction of where to find articles on these issues that would be greatly appreciated. Thank you again for the thoughtful and useful reply, it helped a lot.

If you want to get a handle on the "Less Wrong" approach to decision theory, I'd recommend starting with Wei Dai's Updateless Decision Theory (UDT) rather than with Timeless Decision Theory (TDT). The basic mathematical outline of UDT is more straightforward, so you will be up and running quicker.

Wei's posts introducing UDT are here and here. I wrote a brief write-up that just gives a precise description of UDT without any motivation, justification, or examples.