So i should have made this ticket ages ago, but forgot about it...

Anyway, these tags:
incomingheals incomingheals:personal incomingheals:others
.... doesn't work as intended. They display double the amount than what's actually healed, like it's calculating it's gonna crit by default.

For example, if i cast Healing Wave, it heals for 10k, but the tag says 20k.

Those tags are not implemented by oUF, so this is something we're not in control of.
Please talk to whoever made the layout you're using, or use the forums to ask for help if you implemented them yourself and can't figure it out.