Visa issues

We have a 6-month working visa and a 3 months trial-contract.
That should allow us to stay in the country and work for the next 6 months, (only three needed, but still; simple math) right?
Oh no, wrong
We’re only allowed to stay for 30 days in a row and with only two entries.
Fast-calculation going on in the never-ending-factory-with-no-off-switch upstairs, but the sum keeps adding up to 60.
I’ll try again; we have a six months visa, a three months trial-contract, that’s twice the amount of days than we need, but the damn number 60 keeps coming back.
I must be from Värmland; cause I feel completely retarded.