They actually are fully blooming :-) Your plant has lacecap type flowers rather than the mounded, mophead type. Lacecap flowers are flatter, with a center disk of tiny fertile flowers surrounded by the larger, showy, and usually more colorful sterile flowers.

That is exactly the way it is supposed to look.

but, if you look at 2 of the centers, they are different.. one is probably going to try and develop while the other seems to have died out already.. do you see it? and, they have been like this for about a week

The one to the far right has fertile flowers that have already opened. The ones to the left have fertile flowers that are still in bud.

There is really nothing wrong with your plant. Honest :-))

These are other examples (check the rest of the website when you have time):

http://hydrangeashydrangeas.com/lacecaps.html