Thomann Shaman Bass Flute

Very emotional sound, it would be a great pleasure to play it.
The flute I received had the holes not well placed: when all holes are closed, the sound is a perfect E as it should. But as you open holes, the pitch is "about" half a tone lower. This means you can play about a E flat pentatonic scale, except the lower sound, which is a E. This makes playing it not so pleasant. I hope it's a defect of my flute only, but I can't know.