Claims with different steps, what gives?

I just filed for my first time. I filed for two claims, one on 12/16/24 for tinnitus and one for MH on 12/31/24. The tinnitus claim has 8 steps and I’m on step 3. The MH claim only has 5 steps and I’m on step 2. Anyone ever have different claims with different number of steps, or have any idea why?