Yup, that's right. Now, maybe this is okay, but it seems terrible to me. I bought this house about 3 months ago, so I don't know the reasoning why, but from what I've seen this guy made some poor choices in his DIY work.

There is a 30 amp 240 breaker wired to two individual circuits through 12 awg wire. All I can figure is they ran one leg to one wall of outlets, and one to the other, then somehow branched extra wires to bring the neutrals and grounds back together. I don't know what the wiring looks in the walls to split this, or to splice the neutrals and grounds.

My question first, is this acceptable, and is the breaker size proper for the wire.

Two, I need space for one more slot in my panel, there is no reason for these circuits to be separate as far as I can tell - all they run is a couple outlets each, all in the same room. I'm sure this idea is BAD too, but can I bring both hot leads into a single 20 amp 120 breaker?

Yup, that's right. Now, maybe this is okay, but it seems terrible to me. I bought this house about 3 months ago, so I don't know the reasoning why, but from what I've seen this guy made some poor choices in his DIY work.

There is a 30 amp 240 breaker wired to two individual 120v circuits through 12 awg wire. All I can figure is they ran one leg to one wall of outlets, and one to the other, then somehow branched extra wires to bring the neutrals and grounds back together. I don't know what the wiring looks in the walls to split this, or to splice the neutrals and grounds.

My question first, is this acceptable, and is the breaker size proper for the wire.

Two, I need space for one more slot in my panel, there is no reason for these circuits to be separate as far as I can tell - all they run is a couple outlets each, all in the same room. I'm sure this idea is BAD too, but can I bring both hot leads into a single 20 amp 120 breaker?