I have found a solution! I'll explain it here so everyone who has a similar issue will know how to fix it. I checked my logs and saw some strange notifications stating that I wasn't using a 32 bit client. So basically I tried booting PoE with Win7 compatibility mode on. When I did that, I didn't get the White March DLC's and I suddenly saw my save I had installed before I got the DLC. This led me to believe that for some reason the DLC's weren't being friendly towards my 64 bit operating system.
So, I uninstalled PoE and removed all my save games, both in appdate as in the mygames map. I rebooted my PC, ran steam in Win7 compatibility mode and reinstalled PoE fully. Now, when I run PoE in Win7 compatibility mode, I get all my saves - both old and new. When I disable the compatibility mode, I get none. You don't have to run steam in compatibility mode every time, just the game. I only run steam in compatibility mode when I reinstalled PoE to make sure that I got the DLC's back.
This worked for me, hope it will for everyone experiencing a similar issue!
