yeah that's pretty much what happened to me also, though I used fumaric acid, but it's pretty much the same reaction. You may get a few salty looking things that settle in the vinegar from where it neautralises any lye that would have been present, so you can just filter that out then evap.
I can't figure a way off the top of my head to clean acetate salts of these alkaloids, but it may be necassary.
I suppose if you freebase it then pull with a small amount of limonene that will leave most of the nasties behind. Though I prefer IPA for full profile extract, which would more than likely pull more impurities over so I guess it's only suitable if what you get looks clean. It should be a clear oily goo once evapped. If you get any of the creamy waxy looking substance that will more than likely be an impurity.