Top 10 Songs that Shouldn't Be on the List 'Top 10 Death Metal Songs'

Main reason - because the songs aren't death metal.
Not every metal song with death growls or harsh vocals is death metal.
Moreover, these types of vocals are also used outside metal.
And last but not least, not all songs by death metal bands are death metal songs - Vader have thrash songs, Children of Bodom have (kind of) power metal songs, and so on.
The Top Ten
1 Needled 24 / 7 - Children of Bodom

While Children of Bodom are basically a death metal band, this isn't a death metal song - it has power metal and thrash metal sections/elements but there are death growls from time to time.

2 Burn In Hell - Dimmu Borgir

It's a black metal cover of Twisted Sister...

3 Kissing the Shadows - Children of Bodom

Technically this song is power metal with folk tunes, but with death growls. Even "folk metal" is closer to the truth than "death metal".

4 Inis Mona - Eluveitie

It's folk metal with growls.

5 Arise - Sepultura

Haha, essentially every Sepultura song that's on the best death metal songs list should be here

Thrash metal all the way. Sounds like a Slayer song.

6 Angel of Death - Slayer

Just because it has the word "Death" in the title doesn't mean it's "Death Metal"

Thrash metal at its best. Not death metal.

7 Laid to Rest - Lamb of God

Nowhere near death metal. It just has harsh vocals.

8 Roots Bloody Roots - Sepultura

Nowhere near death metal.

This is groove metal

9 Bleed - Meshuggah

Djent and not death metal. Probably it's better to say Extreme Progressive Metal (prog metal with harsh vocals and not with clean vocals).

10 Decapitation Fornication - Infant Annihilator

It's deathcore and not death metal. There's a difference and for this reason this band isn't on Encyclopaedia Metallum.

The Contenders
11 Inner Self - Sepultura

Definitely thrash metal.

12 Disengage - Suicide Silence

Deathcore and not death metal.

13 Analysis Paralysis - Napalm Death

Grindcore not death metal

14 All Hail the Fallen King - Chelsea Grin

Deathcore and not death metal.

15 Beneath the Remains - Sepultura

Thrash metal...

16 Dead Embryonic Cells - Sepultura

Thrash Metal, true, really brutal, but Thrash Metal as it gets.

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