Was theorycrafting with a buddy today and came across an issue when stacking Minor/Major Resolve/Ward on my Templar Healer. When casting Channeled Focus, it gives me the Major buffs and they stay active until I cast Combat Prayer. The Minor buffs from Combat Prayer override the Major buffs from Channeled Focus and I don't get the effects of the Major Buff anymore.
Upon checking the Character Sheet, the buffs are shown to be active but the actual stat increases are not applied from the Major Ward/Resolve when Minor Ward/Resolve are active. This may be just an UI issue, but I've no real way to test this theory without combat text.