It was intended to promote trade, were these component items listed as bound when you acquired them?
There's a few items that roleplay wise, take more than just one of: mysticism, science, arms. They're usually quest rewards with special effects, or vastly superior to other items of the equivalent level (even though they tend to be trash by the time you get them, or the next quest.)
definitely bug any you find like that. It shouldn't happen in general and yes implies that the thing you were researching on was probably really old data that needs to be updated.
I have noticed that when you get those its off an item that is just a general item. Most say tree they come from but those items don't say what tree they come from.
The first of those type of items I remember seeing is the item that you get from Defender at level 13 or so in MC, the unlockable UNTIL cape. The item you get is of a generic type, and can be broken down by all crafting trees, and gives some parts from each tree.
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There's a few items that roleplay wise, take more than just one of: mysticism, science, arms. They're usually quest rewards with special effects, or vastly superior to other items of the equivalent level (even though they tend to be trash by the time you get them, or the next quest.)