If highest level terms have any weight then active trails rates them lower than there child terms. This means when you click on the node, the menu doesnt get opened to the right spot.
if i move cars above boats gets a weight of three and then when i click on a node with blue it only shows the trail down to boats as it is now the last term. Sailing and blue still have a weight of zero.
I'm using taxonomy menu, taxonomy menu trails and also using activemenu module to give it nice java drop drown like the plus on windows explorer.