That is not uncommon with doubles, especially older varieties. It's called bud blast or blasting, and can be caused by various things. Crowding can lead to bud blast. I grew Mary Copeland many years ago (and recently reacquired some from Old House Gardens), and after a few years the buds began to blast. After thinning them, they started blooming again. This can also occur if they don't receive adequate vernalization.
You may notice catalog descriptions saying "non blasting" for more modern varieties. There are some terrific double varieties these days that are rarely, if ever, effected by bud blast. Tahiti is a great one! Flower Parade has Tahiti as a parent, and was beautiful its first year, and looks like its going to be a perennial "good doer" too.
If you have a lot of Daffodils to thin, and don't mind losing a few bulbs, an easy way is to spear a clump in a few places with a fork or spade, and wiggle it back and forth. You'll definitely lose a few bulbs doing this, but I found by accident a few years ago, that it does the job re-invigorating old clumps that had stopped blooming as heavily.
