I am trying to book a Premium Economy return flight to Atlanta through the BA website having signed in to my EC a/c.

I click on Premium Economy lowest fare with full tier points to access the fare, but when the fare is shown it has moved to reduced tier points. When I go to check the tier point allocation for this flight the only option is Premium Economy, there is no choice between full and reduced points....am I missing something and if I book this fare will I get less than the 75 tier points which is shown...I need 120 for Silver and this return would be perfect.

Thanks