The 01/12/16 update broke some scoreboard elements for me. Uncommenting the "spacer" property resolved this issue. The default value of "5" seems to work just fine.
Also: I voted Option 1 for the item meters because I believe preserving the health-ammo spacing is more important than preserving the size of the item meters. The screenshots are misleading because of varying ammo counts, but both Option 1 and Option 6 will result in double-digit ammo being tightly aligned to the item meter, with regular spacing between health and single-digit/no-clip ammo. Given that the majority of 6's classes don't even use an item meter, plus the fact that many of your other HUD elements are aligned with the current ammo positioning, I feel it would be wiser to modify the item meters and leave the other elements as they are.