Hey CheeseCat
The toluene turning cloudy might be because the added water cooled it down reducing the solubility of dmt in it, that's why the water wash is usually done warm to keep the dmt solubility in the NPS high (both the water and NPS are warmed). It could also be that the water became suspended in the toluene if you shook it vigorously.
Not sure about the blobs, maybe some thing about water tension, or the NPS causing the galss to become more sticky, or a film counting the blobs. In any case it seems like something that you should resolve as you need full separation to pull the NPS cleanly.
Bcz water, even distilled water, becomes acidic as it absorbs CO2 from the air, the pinch of soda carb is to counter that and minimize dmt losses. The amount of soda carb you're putting is miniscule compared to the base soup the NPS was in contact with. So you won't be further contaminating the NPS unless it was ultra clean to begin with. And yes the base water can become suspended in the NPS but would you rather have lye or soda carb in your final product? The water wash minimizes the risks.
You'll find this
thread very relevant.