I designed my own heat pump for my house. It's been running now for about 2 years now, but there is one question that I have failed to find an answer to now, and thought that someone here, may have an answer.

Here's the problem:
When running in heating, the outdoor (evap) has 7 circuits for the distributor. 3 ton nominal system. R22. Balanced port TXV. According to Sporlan's software, the TXV, distributor, and orifice all work good on paper. I have an un-even frosting pattern on the coil however. I'm wondering now, do I have too many circuits?