planed means planed, nothing more noting less. tapered, ready for glue up is more refined, and to do it properly the front profile should also be close to the finished dimensions of the bow. IE. a flatbow 62 in and a longbow 72 in bamboo backing are very different animals but both backing strips could be made from a similar piece of planed boo. Basically bamboo goes from culm to split to planed, and finally to tapered ready for glue up. If the bow that abd posted came glued up from Jim, then Jim needs to go take a class from a reputable bowyer to learn the basic fundamentals of bamboo bow construction. This is not harsh, just the truth. If this his way of customer service he very soon will be out of business and we wont be having this discussion again. You can make bows out of inferior materials, hell duct taping garden stakes of varying lengths can make you a bow and you could probably kill something with it with dry weather and lots of time and arrows. That is really not the point.
God Bless,
Chris Blank