I did the same thingNot a big deal. And over all your application is single so it will not confuse the officer. It is usually required with the family application caz at time some applicants will send all the photos together, that time we need to write the names behind. As long as you have send them 2 photos then you are fine.
Forgot to write my name on back of the photos
But when and where it was taken are stamped
Lets see if the officer is easy going or a strict one..