Like LynnC said, decant means to gently pour the clear liquid off the top of the liquid surface.
The bubbles on the surface of the barbed wire in the pot is probably dissolved air coming out of solution. Three days is nothing! Vinegaroon is NOT a Polaroid product! Go do something constructive and come back in 3 months.
Grey, The color you have is almost exactly same as the original rifles on exhibit at Dixon's each year. Also, are you judging your results under a fluorescent light? Remember that the color you see is reflected light - the source of the light matters. There is no red or red-orange light in the output from a fluorescent light. You will have to judge color by taking your samples outside.
With the next rifle I stain I plan to follow the following process:
I will take my stain pot and decant off about 1/2 pint of clear liquid into a screw-lid jar. I will add 1/2 pint of fresh cider vinegar, screw the lid on tight and let it set for a couple of weeks.
I will scrape the stock down real fine, dewisker with warm water and a rub down with de-oiled 0000 steel wool and then burnish it with my hemp brush.
I will then apply a coat of stain with a foam brush, saturating all surfaces throughly. (I stain with all furniture removed)
Once the stain has dried I will rub down it with de-oiled 0000 steel wool and burnish with my hemp brush.
I will give the stock 4 or 5 coats of stain this way waiting a day or two between coats.
Then I will apply finish. I expect the rifle to turn out pretty much the others have.
You don't have to use vinegaroon if you don't want to. I just find it the simplest way to get a nicely stained stock - no dangerous acids, no need to heat, no need to neutralize, no interactions with metal parts (that I know of).
Best Regards,
JMC