( http://www.battle.net/diablo2exp/skills/basics.shtml )If a character gets an oskill bonus to a skill that class "owns," the bonus is restricted to a maximum of +3. If a Barbarian is dual-wielding Call to Arms runeword weapons, the +3 cap is applied to the total from both weapons. This is all intentional, in order to balance these items.
+Battle Orders is capped at 3. However, on a +3 bo CTA, you get +3 Battle Orders and +1 All skills, so total 4. And no, you cannot use another CTA for +8 total, as you are limited to TOTAL +3 Battle Orders, so you will only get the +1 all skills from another CTA.From Lorven's post i have understood that bo from cta it is still capped at 3 for barbs even with the 1+ skill. Am i right?