I was searching for a pattern among the cookie sheets. I thought I detected batches of 12, but then one batch had only 11, and a couple of batches seemed to have only 9 or 10. So....hmmmmmmmmmmmmmmm........
I guess the baker has some prerogatives. 
DR Ron Pulliam - I guess I'm flattered in a sense that you chose to pay such close attention to the "patterns" on my cookie sheets, so, in return for your attention, I offer you the following breakdown:
I ended up with 35 Peanut Butter Cookies this time round. The original recipe actually yields 18 large(!) cookies, but cookies that large just don't seem conducive to "friendly" distribution. So, instead of using a 2 oz. scoop/disher, I used a 1 oz. one which sometimes yields me 36 cookies, sometimes 37, sometimes 35. By the time I had taken the picture, I had already bagged up some of them.*
As for the Oatmeal-Chocolate Chip-Pecan Cookies, this morning I ended up with 46 cookies - which would explain the batch of 10 on one sheet. The original recipe - which I doubled this morning - is supposed to yield about 36 cookies (so I should have ended up with 72 cookies, give or take a few), however, I make them slightly larger than the "rounded teaspoon" called for in the recipe. (Again, I used my 1 oz. disher.)
*Since I had forgotten to adjust my baking time accordingly due to the smaller size of the cookies I was making, I ended up with one sheet getting a little "dark" on the bottom. So, as soon as that batch was cool enough, I went ahead and tasted one just to see if tasted burnt. It did taste a little burnt, but more like burnt caramel, rather than burnt flour. Needless to say, the over-baked ones are
not going to the theatre, but they should be good crumbled over some vanilla ice cream sometime later today.