Answer
(Fatwa: 97/94=J)
There is no wrong in offering qaza salah (missed prayers) before and after obligatory salah, but it is necessary to avoid makrook timings. It is better to make up missed prayers instead of praying nafl salah (optional prayers), but forsaking sunnah salah without an excuse is a sin: والاشتغال بقضاء الفوائت اولی و اھم من النوافل الا سنن الفریضۃ وصلاۃ الضحی الخ (الشامی: 2/536)
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband