when i was farming on my rogue i was switching between track minerals and herbs so fast it was eventually bugged and i could track both
after i logged off and logged back on it was still the same with no need to repeat
http://img144.imageshack.us/my.php?image=wowscrnshot122008150703lp4.jpg
this is a screen i made with 2 nodes appearing on minimap
my rogue got banned after for other reasons but as soon as i get another char with 2 gathering skills ill try repeat it..