The Superhero Database Classification number, or SHDB Class, is a number that represents the overall 'power' of a character. All traits of a character are used for calculating the Classification.
What it DOESN'T mean
This doesn't mean that a higher class would always beat a lower class character. But the bigger the difference in Class is, the more obvious it is who'll win in a fight.
How is this calculated
( INT^1.3 + (STR*0.5 )^2 + (SPE*0.5)^2 + DUR^1.6 + (POW + (SPS*SPL))^2 + COM^1.8 ) ^ TIER
Super Power Score and Level
Every Super Power has a score (SPS) that is used to calculate the Class. Each Super Power also has 3 levels (SPL). The level is set when connecting that Super Power to a character. The level determines the final score, of the Super Power, being used in the calculation.
Soul Manipulation should be this way because he split his soul into 7 pieces, and was even able to give his diary Horcrux a mind of its own.
Electrokinesis should be in this category as Voldemort was shown on many occasions to be proficient with lightning spells. This can be seen during his duel with Dumbledore, and when he altered the weather with a beam of magical lightning.
Soul Manipulation in the high category as he did rip it into 7 pieces after killing 7 people.
Electrokinesis added into the high category.