I recently came across these two hadiths:
Narrated ‘Aisha: Allah’s Messenger never missed two Rakat before the Fajr prayer and after the Asr prayer openly and secretly. Sahih Bukhari 1:10:566
Narrated Abu Huraira: Allah's Apostle forbade the offering of two prayers: 1. after the morning prayer till the sunrises. 2. after the 'Asr prayer till the sun sets. Sahih Bukhari 1:10:562
Now I'm confused. Should I offer two rakat after Asr, or no?