Asalam u ailikum
The below mentioned hadith which is quoted from Sahih BUkhari states that we have to pray only eleven rakats of tareweh, but some other parties are not in favour of this hadith. After all how many rakats we have to pray? The other ahadith which are quoted from tirmidi and other books did not have proper sanad ie their narration is weak. Also if we will see the book of Allama Albani " Fiqh ul Sunnah" he also states that we have to pray only eleven rakats and the other narrations are bidah(innovations). Further SAhih Bukhari is the only book whose status is next to Quran and we must have faith in it .It is said that if two sahih ahadith are qouted against each other and there is one between them which belongs to SAhih Bukhari, We have to obey Bukhari's hadith.
Narrated Abu Salama bin Abdur Rahman RA narrates
that he asked 'Aisha RA"How was the prayer of Allah's Apostle in Ramadan?" She replied, "He did not pray more than
eleven Rakat in Ramadan or in any other month. He used to pray four Rakat ---- let alone their beauty and
length----and then he would pray four ----let alone their beauty and length ----and then he would pray three Rakat
(Witr)." She added, "I asked, 'O Allah's Apostle! Do you sleep before praying the Witr?' He replied, 'O 'Aisha! My eyes
sleep but my heart does not sleep." (SAHIH BUKHARI vol 3 hadith 230 or 2030)