The big wide world of label reading does get confusing. When in doubt or even not in doubt, it's best to check products with a reliable carb counter. There is one on this site under Low-Carb Tools at the top of the page and another is a book : Corinne T. Netzers Complete Book of Food Counts.

Here are some threads that will provide you with more info:

The "What's the Scoop on Mayonnaise" Thread

Carb Counting and label reading

Karen