Unable to discover Iron mine

[Margowicz1]

I cannot find the third iron mine in A4, I can find two with no problem but never could discover the third. I thought it was something the entire settlers had I now know it is only me as I looked with some other people

[SmurfAsH]

Those having 3 iron mines in A4 won't have any in A1.

[Dappadon]

I have 3 in A4 and 1 in A1