Many WebmasterWorld members are reporting that Google has been displaying the same ad and same creative more than once on the same search results page at Google.com. The, what seems to be, "bug" has been reported to Google, no confirmation as of yet has been made by Google.
WebmasterWorld AdWords moderator, eWhisper explains the two ways this can be happening;
1. A glitch in the AdWords system (which is admittedly happening quite a bit now). 2. When a domain has special approval to show upto 3 ads at a time (this is usually based around the landing pages being independent from each other).
Either this is a policy change or a bug - we will see.
Forum discussion at WebmasterWorld.
