It seems odd that you're still showing ammonia. Did you just recently add something that would act as a source such as another piece of rock, fish food, etc?
Usually, the nasties will disappear in the reverse order that they appeared. When cycling, you first get ammonia, followed by nitrites, then by nitrates. At the end of the cycle, you find the ammonia disappears first, then the nitrites, and you're left with a bunch of nitrates.
Seeing how long you've been cycling by your previous posts, and the fact that your nitrites have disappeared, I'd say you're getting close to being done. But I just wouldn't expect that ammonia to be there.
It's safe when both ammonia AND nitrites are at zero.