I just saw the pic from the last test. That looks like everything is zero. If you are cycling and did not do a big water change, then your nitrates should not be zero. They should be high. Are you sure you are testing correctly?
You should get a better test kit. Spend 40 bucks and get the red sea test kit. I just went through the same thing. You'll see the difference. Api is good for freshwater. Not really salt water. Just the fact that you have 4 different people looking and all have a different opinion on what the results are should tell u something.
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Well i got cleaner shrimp. I acclimated them for an hour and a half. Once I put them in the tank I left the lights off for four hours. When the lights came back on I sat and watched them for awhile then fed them. They ate and ate a lot....