A Tale of Two Curtain Rods

There was this curtain rod,
Well, to be honest, two,
We made sure of all the measurements twice, 

Put one up tried and true,

Three brackets securely installed level,

Finial on one end,

Next was rod number two to mirror it,
Curtains to be bookends,

Of white-painted brick, smoke chamber and flue,

One more book, the firebox.

Oh, the hue of th'other bracket set's wrong!

E-retail sucks bollocks.

What's the moral?
Some things just have to be,
Best be them earlier, sooner than now,
And never forget to get the receipt.