SCH glitch or am I misunderstanding?

[Ninimo_Babamo]

EDIT: Nvm, question has been answered. Let this peacefully die.


So an FC member today told me he hit 11k on an adlo, so I wanted to see if I could copy the result, but add in a couple buffs.

Eos, Fey Illumination, Dissipation, Emergency Tactics, Adloquium.

You cast Adloquium.
 Critical! You recover 4652 HP.
 Critical! You recover 9304 HP.

You cast Adloquium.
 Critical! You recover 4826 HP.
 Critical! You recover 9652 HP.

Same effect twice in a row.

Maybe my logic is just bad.

I don't understand why the first Adlo is a crit, but the second from the Emergency Tactics is doubled that. Emergency Tactics literally turns the shield from Galvanize into a second heal.

Adlo crits 4826, the resulting galvanize would then be 4826.
Why does it double to 9652?
It seems like it is making a crit heal from a shield nul from a crit heal.. So its the crit of a crit.

I'm so lost.