Vetrofond Extra Light Olive?

I may have missed something here.  The label on the rods says they're Vetrofond extra light olive and, in fact, the unworked rods ARE extra light olive.  When I work them they go pinkish beige with a heavy coppery reduction that reminds me of Picasso finish on Czech glass.  My old batch didn't do this but I'm at a loss as to why.  I do like the color but it wasn't what I was expecting.

It does work great for bunnies!