You're trying to say that God is confused, then? He's the one, IIRC, that said, "Thou shalt not steal" and even "thou shalt not covet". You mean he was confused? When Paul said that covetousness was idolatry, he was mistaken?
I don't think so. Where you go wrong is that the Bible commands me to look out for my fellow man--but nowhere does it authorize my fellow man to barge into my house and take what he (thinks he) needs.
They didn't do with the property what God had wanted and yet (which was worse than the actual shortfall) claimed that they had.
Reread it. The problem was that they lied. Peter is specifically telling them that (1) they were not required to sell their house, and (2) having sold it, they were not required to turn over every penny. What offended God was their decision to lie about their decision. IF they'd said, "Howdy Peter, we sold our house, and here's half the money," they'd have been just fine.