Hi,
I don't see a "broth" option under hops. There is a "both" option under the hop editor for the aroma/bittering type box which allows you to specifiy hops that may be used for either bittering or aroma.
Also, on hop usage (when adding hops to a recipe) there is an option for hop usage that allows for "Aroma" hops to be used which is essentially steeping the hops at the end of the boil (without boiling it) to aid in aroma.
If you have a specific location where it shows up it might help me to narrow it down.
Cheers!
Brad