Yes....they have some very strange defaults.

I entered a S/F fruit spread I use as a custom food and though I put it in as a Tbsp, it defaults to a litre. Like that makes any kind of sense.

I don't know anything about dietwatch, but to put in a whole custom recipe, open a future day in a separate window. Then enter all of the components of the recipe on that future page. When it's done....transfer the totals and enter them under "New Custom Food".

M