Nick they did have a Disclaimer about Tongue Weight and Hitch Ratings
While it's not listed in the charts, tongue weight is also an important consideration. The recommended tongue weight is between 10 & 15% of the trailer weight. However, the maximum tongue weight on Class III (The bumper ball) is limited to 500 lbs, and Class IV (The receiver hitch) to 1200 lbs.This requirement overrides any recommended GTW rating, between 10% and 15% of gross trailer weight (GTW). Additionally, the GAWRs and GVWRs should never be exceeded.