Sometimes when you connect a file through the materials "colour" channel, it sometimes also connects the same file through the transparency channel. Try right-hand clicking on "transparency" channel, under "Colour" in the material's properties/attributes, and select "break connection".
www.stevenegan-cgi.com
"Your weapons are no match for ours! People of Mars, surrender!"
"Um, this isn't Mars. This is Earth."
"Earth? Earth-with-nuclear-weapons Earth?"
"Yes."
[long pause] "Friend!!"