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Looks like both URLs are being rendered from the same View (products.php). Depending on how your site was implemented you're going to have to address it at the controller and/or rewrites level.

What the error says is that the page is redirecting to itself ad-infinitum.

In the campaign manager, is there a way to track trends in the average ranking of a labelled group? We divide our keywords into aggregate buckets which we maintain on week-to-week basis and we're more interested in how we're doing for each bucket as opposed to individual keywords (which fall in and out of buckets over time)

If this isn't possible - is it part of the product roadmap?

Thanks