Sorry, busy week!
Thank you for your replies.
soybean-I have an HP PSC 1610 All in One printer that I bought used at a garage sale. I've had little problems with it, it seems to work fine. I think my boss uses a Canon.
I probably print only about 30-40 worksheets each week for my job, so not a tremendous amount. Honestly, I have been assigning more essay work so that I don't have to print up these messed up worksheets!
I don't print more than one answer sheet, if that, per set of worksheets. I am building up a file of every answer sheet, so I really don't need more than one of each.
I will simply assume that my printer will not ever print those little circles! I give up! But thank you all again for your time, and your ideas.