[Gimp-user] Selection Bug?

[Scott O'Nanski <s onanski gmail com>]

Here's the situation;

I'm using GIMP 2.8.x

I'm attempting to make a pressed letter effect with two layers. One 
layer is a text layer, the second layer (above the first) is a selection 
of the text from the first layer. I'm attempting to fill the selection 
on layer 2 with black and nudge it down by three pixels.

So, I have the selection filled on layer two, but I can't nudge the 
outline with the rectangle tool, and I can't used the position spinners 
either.

Is this a bug? Or am I not thinking like the developers on this?