Hibiscus: Any idea why?, 1 by TessC

TessC wrote:
I purchased this Pride of Acadiana from Dupont and this is its fourth bloom. The others looked more or less like this one. In theory it should be a double with yellow edges and pink centers, and on mine you can see little shades of pink in the center, but mostly it's this sort of dirty-water color.

Any ideas? Does anyone else have this cultivar? What's your experience? Am I doing something wrong?

Any ideas appreciated!

Here's the original description:http://dupontnursery.com/Product.aspx?cid=1&pid=81