Got a weird annoying missfire on my car (started a few weeks ago but usually cleared within minutes but now its not clearing), anyway. . whilst checking it over I took the rotor arm off the dizzy and noticed the bit of the dizzy it clips onto has some in and out play on it. . is this normal?

didnt feel normal
missfire is on #2, changed leads/cleaned plugs. . cap looks a bit fucked and could prob do with a change. . no moisture in it tho. . need to get a new cap and rotor arm and check it then now..
could low fuel cause a missfire. . doubting it. its just on idle. . not tried to drive it as fuel is too low, car never gets used. . also the plug was soaked in fuel so its deffo not getting a spark on that cylinder? never tried it with the plug out tho.