Answer:
(Fatwa: 266/263/B=1432)
(1) You should offer with them the salah in time and offer the other salah at its time.
(2) It is makrooh according to Ahnaf to recite two Surahs in single rakah of fardh salah but if one recited it then also it is lawful and salah shall be valid. You may recite the ayahs of sajdah in fardh salah and can offer the sajdah as well.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
