Harvesting Graphical Bug
I have noticed the same thing. Whenever I gather the materials I am using the correct tool, but when I see other people gathering they are using the pick for wood and axes for mining.
If you did what they did, you would have what they have.
You have what you have because you do what you do.
You have what you have because you do what you do.
Glad I did a search, was just about to post this bug.
Also see this bug. I adventure with friends and they always appear to be using the wrong tools for gathering, where as my character appears to use the proper one. Has been this way since beta, I believe. Just one of those little things that makes the game look unnecessarily sloppy, often.