Thanks, but I already looked at that site and to be honest I just don't understand what they mean
This is what they write:
Lethal red and ci/cch gives "mock cream", revealing its true genotype when odd young pop up. Aw brings "mock chinchilla" - it can pass for a chinchilla but "breeds wrong". Using the same logic, A/A and A/a ci/cch are "mock silver agouti". With at:n and a:n one should get about the same as with cch/cch, possibly a tad lighter. Tan gets diluted into (poor) fox.
Maybe some of you can explain it in a way I can understand
As far as I'm aware aa cchcch is a poor, slightly faded black as cch doesn't show that well on black pigment. So I think it's saying that aa cice looks like a poor black in the same way that aa cchcch does? I don't know though, it's not that clear.