Hoping for some clarity. My game level is 50. My survivor (25 out of 53) level is 18. As for the storyline missions I'm on chapter 15 with zero completed at regular difficulty. The zombie difficulty here is level 24. So basically I'm finding it impossible to progress with the storyline missions and I've been steadily improving my survivors and their gear. Everytime I make improvements with the hope of making progression I find the difficulty has also increased. What am I doing wrong?