But you can also consider the effect of a strong presence using still the ad...
In fact CTR went down since site reached #1 I guess because many people click in the free result instead the ad for the same keyword.
What do you think?
The adwords conversion stuff works fine if installed right. Have a look at the installation manual (AWA probably has a URL somewhere).
Sorry, didn't see this till just now. The installation manual (aka Setup guide) is always available from within one's account by following this path:
Campaign Summary > Tools > Conversion Tracking > Setup guide (.pdf)
AWA