No, eMatk is visible; it's just lumped with wMatk in the stat window.
eMatk are not like that... eMatk are the ones that you can't see in stat windows such as musician buffs, box of drowsiness and such... weapon matk counts as the whole number in your right side of the stat window...
I did test it long ago and got something similar.
And wMatk can't be the whole number on the right side because the right side includes things such as Odin and HBP. The wMatk formula doesn't include those buffs anywhere. =s
It makes sense to have these kinds of buffs go into a separate category of matk instead of being counted into the weapon.
Also don't think box of drowsy even shows up on the stat window at all.
Our stat window is crap.