Paladin's Blessing of Might buff

Not sure if I am just crazy or if their is a bug..
The "tooltip" for Blessing of Might shows increases Attack Power by 20 by default. If you put points into "Improved Blessing of Might" it does nothing to change the tooltip. Even with 4/5 points in their and it currently being at an increase of 16%, I am still only getting +20 Attack Power when I check my characters stats.
Anyone else notice this too?
The "tooltip" for Blessing of Might shows increases Attack Power by 20 by default. If you put points into "Improved Blessing of Might" it does nothing to change the tooltip. Even with 4/5 points in their and it currently being at an increase of 16%, I am still only getting +20 Attack Power when I check my characters stats.
Anyone else notice this too?