WowAce

What steps will reproduce the problem?
1. Engage mythic Gorefiend
2. Cast Power Word: Shield on players
3. Take damage from Surging Shadows

What is the expected output? What do you see instead?
In Skada, damage taken from Surging Shadow does not count damage that has been absorbed by PW:S (or other spells).
This can be confirmed by:
1. Check damage taken from Surging Shadow using the log (as in warcraftlogs.com) - Notice that this does not give the same numbers as Skada.
2. On warcraftlogs, uncheck "Self Absorbs" and "External Absorbs" to only see raw damage taken from the spell. These numbers are the same as in Skada.

What version of the product are you using?
1.4-32

Please provide any additional information below.