Many words have more than one tag. A few examples:

• apse is classified as both christiantity and architecture
• bêche-de-mer is classified both as zoology and culinary
• Blighty is classified as britain, slang, and geography

Complicating matters are words that have several meanings. One example is sorrel which has both an equestrian and an unrelated botany definition. In this case we made a separate definition for sorrel horse. When this is not possible we try to find at least one usage example for each definition. It is not the perfect solution, but for now it is the best we can offer.

Simply because we are not done with publishing all of the definitions for that title yet. How much higher it climbs obviously depends both on the difficulty of the book and whether the collection will be partial or comprehensive.