The consistency of the sauce is very watery on top with the mashed/blended onion at the bottom.
Dirk,
this is normal to a certain extent. i always give the stock pot a good stir before taking out for dish frying/cooking.
It doesn't seem to mix very well - this isn't normal at all. once the stock pot has had a good stir it should hold the "solids" in suspension with settlement over a period of time.
the only thing for me is u could bee putting in too much water at the start (i always add at the end).
if u can take a photo of a spoonful of the base on a plate (from say the top and the bottom). alternatively i'd follow one of the site's bases exactly to spec and see what difference u get (any of the good ones - CA's aka is current and getting a good cross section of support).
i'm making base today and will take a photo for comparison.