Mishaps in Baking

So, just when I thought I was on a roll with my baking skills I end up with a small baking mishap. It wasn't TERRIBLE...I mean it was still edible. It just wasn't what it was supposed to be. I know enough about cooking that I can usually fix what I think went wrong. However, when it comes to baking I'm seriously at a loss. I am purely at the mercy of the recipe I'm following.

For instance, I've made scones before. I actually made them a lot in Boston and they came out perfect and delicious. The last two batches I've made were barely tolerable. (Well, that's harsh...they were just not SCONES). The first batch I made a few months ago I threw out in frustration since the dough was completely useless. This most recent batch was better but they did not come out crumbly. They came out a little like spongy biscuits. Maybe it was the use of whole wheat flour? Maybe Florida humidity is no match for the scone? I haven't given up quite yet, though. I'll be trying again soon. First, I have to finish this batch.

Basic Scones
from Domino Magazine

1 lb all-purpose flour (I used whole wheat flour.)
1/2 tsp salt
1/4 to 1/2 cup unsalted butter
4-6 level tsp baking powder
1 1/4 cups of whole milk

Preheat the oven to 425 degrees. Sift the flour and salt into a bowl. Cut the butter into little pieces, and rub into the flour with the tips of your fingers as quickly as you can. Sift in baking powder; combine. Add milk and mix lightly into a spongy dough. Knead very lightly to make the dough smooth and roll out 1/2" to 3/4"thick. Cut scones and let it stand for 10 minutes. Brush with egg or milk before placing on to a greased baking sheet. Bake in the middle of the oven for about 10 minutes, then let cool.