In a second campaign, I have one and only one ad variation,the headline reading "Skimboards on Sale" and the following keywords:
skim board skim boards skimboard skimboards
Why then is it that when I type "skimboards" (without the quotes) in the google.com search box, I see my ad that starts with "Buy Fiberglass Skimboards" when the keywords associated with that ad DOES NOT contain that keyword skimboard, but instead only has two phrase keywords? This makes no sense. Is this a bug in the adwords system, or am I missing something?
If you want to control how your keywords match to queries more accurately, I'd recommend adding these keywords on Exact match to your 2nd group. You can also add these specific terms on Negative Exact Match (like this: -[skimboards]) to specifically prevent them from matching to the 1st group, as well.
Broad match does strange things - so I won't pretend to know the details of why your ads are matching the way that they are... but, it's not "pulling the ad copy from another totally separate campaign"... Google is somehow matching this query to a keyword in the 1st group and since they're all on broad match - there's a number of reasons why this is happening (including 'history' overriding what may seem like a more logical match). But, you have controls available to you to address this situation. Good luck.