The dark, yucky liquid at the bottom is a classic sign of majorly overheated soap, which can happen with GM soap. You can rebatch it, just make sure everything is evenly incorporated. It won't look quite as pretty as it would have, but it will still be servicable soap. 
ETA: When you do the next batch, you can pop it in the freezer when you put it into the mold to prevent this. I've actually tossed soap that was already starting to overheat into the freezer and saved it.

ETA: When you do the next batch, you can pop it in the freezer when you put it into the mold to prevent this. I've actually tossed soap that was already starting to overheat into the freezer and saved it.
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