This differs from application to application. In the RR, the note would also say "ready to finalise," or "appears to be met," both these terms suggest that you meet the eligibility criteria.
As regards why a RR? Even if you do not have an RR, all application have to be reviewed by the officer, before a final determination is made, irrespective of the recommendation by the CPA or Analyst. If there is an RR, then in most cases it is for a specific issue, just highlighting it for the officer to make a careful review of it before making a determination.
Also in many cases which Ministerial Instructions to apply, such as MI3 etc is a factor that has to be looked into, and it is they referred to the officer. RR does not delay your application or make it any worst then others, this is just an internal procedure, and no one would like to take the onus on themselves if the file goes to litigation, so the easy way is to mark it as RR even if it appears everything is in order.
Also, the RR you have is very generic, as in many other applications have it. So you should not be too concerned about it. When you request your GCMS notes next, you will see that your eligibility is passed.