I can't figure out this DNA stuff!?

You're not doing anything wrong. If you break the sequence into codons, you get 8 of them and then 2 more letters. I looked each of the three letter blocks (codons) up in my biology textbook, but there are no stop codons, and the last two letters leave you hanging. Not every sequence will have a stop codon since you are not looking at the whole strand, only a part. Check your text book for the name of the amino acids! Good luck!