This ear infection will not go away?

There are many little tubes that connect the ear, nose and throat. When I've had this problem in the past the sore throat has been due to the ear infection. I'd bet that as long as the ear is infected you'll continue to get sore throats. You should go back for a follow-up and see what your doctor says, they may give you a stronger antibiotic or another round of the first one since is did help a little bit.