This is totally wrong. You must not perform two witr in one night as this is prohibited.

If you perform it with Isha, pray only even number of Rakah in tahajjud without praying witr.

I pray Isha behind Imam and then after Isha I offer witr in Masjid and come back home and sleep and then wake up for Tahajjud and pray 8 rakah and again I pray 3 witr. I’m confused because I’ve heard a Hadeeth where prophet p.b.u.h. Said do not sleep before offering witr and then I’ve seen your video about witr. When should I pray witr ? After Isha or Tahajjud ? Or once after Isha once after Tahajjud?