Multiple people confirm that SkadaHealAbsorbs doubles absorbs in this thread.
If you need some other justification just look on the date SkadaHealAbsorbs was last updated (1.5 years ago). Or simply compare with Recount or World of Logs absorb numbers.
Skada (and Recount and WoL) of course only counts absorbs that are really used. Just like it doesn't count overhealing.