Thats because baking the baking soda makes it more soluble.
After re-reading Randy's recipe article it seems that you can not mix recipes 1 and 2 because then it would not be balanced.
Recipe 2 uses half the amount of calcium.
So I guess at this point you have two choices.
Either dump and start over (if you have already mixed the calcium portion), or cut both recipes in half and use it up until you make your next batch. Randy states that it stores very well.
I would do the latter since your pH is pretty good.
Just remember, if you cut the alk recipe in half you'll have to cut the calcium in half.
That junk in the bottom will dissolve if you take half out and replace with fresh water.
If you do cut the alk in half, give it a good stir before you split it in half. That way you'll get about the same baking soda in each half.