showing twice is the way bbpress likes doing it !
You can turn off the forums root slug in settings>forums
or play with this code
Layout and functionality – Examples you can use
Don’t know how the latter would work with your plugin
Yeah that didn’t work because it only deals with bbPress’s internal breadcrumb plugin…. You can see exactly what I’m looking at on my site here.
I already have the breadcrumbs turned off completely for the bbPress internal bit. Just not sure why another plugin would render bbPress’s index page twice and no other pages.
Without spending a lot of time cracking open the breadcrumb trail plugin, I couldn’t say.
May try their support forum
Hope you get fixed !