Hi there!
That's very good news! I am glad you got your intervirew lettter and you're going to the final steps for your naturalization. I am used to saying that Milwaukee D.O. is an excellent USCIS bereau because it processes the applications extremely fast compared to the others D.O.s! Basically in 4 months I got my citizenship!
Regarding your letter, don't worry about what it says. Let me tell you just a short story. These letters/sentences are standard. After my interview, the office checked the N-652, the naturalization Interview Results, the item "A" says :
"Congratulation! Your application has been recommended for approval. At this time it appears thatyou have established your elegibity for naturalization. If final approval is granted, you will be notified when and where to report for the oath ceremony"
As you can see, I guess it is just a standard sentence. Otherwise, the officer never would have said to me after my interview:
"Congratulation! You will receive your oath letter soon"
Good Luck! and soon you will be here typing the good news!