Gosh!! Your Ammonia is really high my liquid test kit only goes up to 5mg.
You only have 5 fish in a 55gallon too hmmm it sounds really bizarre that you are still seeing those reading I will have to search your original post...
Are you feeding them tons of food that is making it so high

Have you been doing a gravel vac?
Even though you are cycling a light gravel vac will really help and not do damage.
Maybe you can try and start over somewhat.
The way I cycled my 20 gallon was with 5 very small fish I did 10 percent water changes every day from day 2 after 1.5 weeks I started to lightly gravel vac when I saw a slight ammonia spike it went from 0 to 0.25 stayed at 0.25 for 4 days and then went back to zero I did two 15% water changes on two of the 4 days and 10% on the other two days... So basically after 2 weeks my ammonia was 0 and my nitrite was kicking in my tank was fully cycled by 1 month
I'm in no way an expert but your perameters to me sound literally off the chart I was panicing when I saw a tiny change in color off the 0 in my chart..
I hope you can get your tank back under control it sounds like your test kit isn't working right or you are feeding waaay too much or the 2 x 50% water changes didn't cut it.

I'm sorry it must be very frustrating if I were you I would somehow try and start over or get another Ammonia test kit and see but with the water still being cloudy it may well be right?