Yeah, I have noticed that some the of the gathering log materials are a bit off when not in their prime location. I would like to see it fixed, either by removing the alternate locations from the 1-10 gathering logs where you cannot actually get them at that level, or put in nodes in that area, making it so gatherers can gather at any location instead of one.
They aren't off at all. If your goal is to find where harvestable nodes of your level are, you just need to ignore the shards. The shard elements you harvest is basically determined by the zone you are harvesting in, from what I can tell.