1.   If the sauce seems too sweet, add a dash of red wine vinegar.

2.   Although the taste is fine, the sauces seem to separate or curdle.

3.   If sauce seems too thin, add a little of the arrowroot mixture and simmer until it lightly coats a spoon.

4.   If the sauce seems too thick, dilute it with a little water or stock.

5.   Taste and add vinegar if the sauce seems too mild.

6.   This one will definitely benefit from that treatment, especially if the sauce seems dry.