
If you ever need to remove a smell from a previously-used bottle, a quick rinse with a solution of Sodium bicarbonate will do the trick - but rinse well afterwards - it's alkaline, which doesn't agree with glass.
Good perfumes should be kept in the dark, to prevent deterioration from the effects of light.

Maybe it's my science training, but I'm simply not comfortable with decanting things from their original bottles - you loose the direct connection with the name and batch number of your stuff, and risk introducing contamination. Should any problems arise, you can't be sure of their source.