Apostle Paul writes to Timothy, whom he considers to be his true son in the faith. Paul urges timothy to charge some, to teach no other doctrine (than the gospel of Jesus Christ) like some where doing. Paul gave timothy the proper order of the church and urged him to instruct the brethren to conduct them selves in like manner.
That is so good. I agree with your point on the fact that only some were actually teaching the doctrine (the gospel of Jesus Christ). Paul pointed out to those strong believers the characteristics of those who were not strong in the faith.