[Histonet] alcohol to xylene and back to alcohol again!?

[Susie Warwick]

I am a junior tech, slowly working my way through all the training.
mostly I'm at a microtome all day.
Anyway I've noticed that our processing schedule also has the backwards 
alcohol step (Exploding skin samples thread)

ie
alcohol
alcohol
xylene
alcohol <------
xylene
xylene
wax
wax

Now I dont have as much experiance as my supervisor, but it seems like a 
really weird processing schedule to me.
Does anyone else do this? Why is this step in there? I got told it was to 
help process fatty tissues?