They're called "sentence enhancers."

The codex isn't trumping anything. Nothing in the blood lance rules contradicts the rulebook or the FAQ.

The first sentence says "this power is a psychic shooting attack."

The FAQ says "Any psychic power with a profile like that of a ranged weapon (i.e. has a range, strength and AP value) and any psychic power that specifically states that it is a psychic shooting attack."

How is this difficult to comprehend?

Pink is the color of rationalism.

Here's something I made up for a BA Terminators list.

HQ
Librarian @ 100
1 Librarian w/ bolt pistol; force weapon
Blood Lance; Unleash Rage

TROOPS
Assault Squad (5 strong) @ 145
1 Space Marines w/ meltagun
1 Sergeant w/ infernus pistol; bolt pistol
Razorback w/ heavy flamer

Assault Squad (5 strong) @ 145
1 Space Marines w/ meltagun
1 Sergeant w/ infernus pistol; bolt pistol
Razorback w/ heavy flamer

Assault Squad (5 strong) @ 145
1 Space Marines w/ meltagun
1 Sergeant w/ infernus pistol; bolt pistol
Razorback w/ heavy flamer

Assault Squad (5 strong) @ 145
1 Space Marines w/ meltagun
1 Sergeant w/ infernus pistol; bolt pistol
Razorback w/ heavy flamer

ELITES
Terminator Squad (10 strong) @ 460
2 Terminators w/ cyclone missile launcher

Terminator Squad (5 strong) @ 230
1 Terminators w/ cyclone missile launcher

Sanguinary Priest (2 strong) @ 116
2 Sanguinary Priests w/ stormbolter; melta bombs

FAST ATTACK
Attack Bike Squadron (1 strong) @ 50
1 Attack Bike w/ multi-melta

Attack Bike Squadron (1 strong) @ 50
1 Attack Bike w/ multi-melta

Attack Bike Squadron (1 strong) @ 50
1 Attack Bike w/ multi-melta

HEAVY SUPPORT
Dreadnought @ 120
1 Dreadnought w/ twin-linked autocannon; twin-linked autocannon

Dreadnought @ 120
1 Dreadnought w/ twin-linked autocannon; twin-linked autocannon

Dreadnought @ 120
1 Dreadnought w/ twin-linked autocannon; twin-linked autocannon

TOTAL: 1996