Exhorted from Paul’s Purpose (1 Timothy 1:12-20)

There seems to be tension between Paul and Timothy.  The root of this tension is that Timothy has most likely requested to go to Macedonia to meet with Paul, but Paul wants him to stay in Ephesus.  We can see that one reason for Paul to write this letter is for Timothy to stay in Ephesus.  Why is Paul telling Timothy to stay?  Is this just a church that Paul does not want to put in order?  Is Paul merely making Timothy do something that Paul does not want to do?  Is Paul reminding Timothy that Timothy does not have enough clout because he is merely a preacher and not an apostle?