Let's talk about Red Magic.

[JMadFour]

In my opinion, RDMs developed some unaspected (and thus unaligned) spells for their repertoire. Think of like how Arcanists use Ruin, an unaspected spell. Jolt/Jolt II are likely the same idea, with the express intent to enable dualcast, as a Red Mage's White and Black Magic spells are powerful and have involved casting times.

The consensus on Reddit seems to be that Jolt/Impact/Scatter and such are spells that are both Black and White Magic combined.

so RDMs use Black(Thunder/Fire/Flare), White(Aero/Stone/Holy/Cure/Raise), and then Red(Jolt/Impact/Scatter/Embolden/Enchanted Melee), which is both Black and White at the same time.