Odd Data in Content Network

[shenbo]

I have the following data for one of my Adwords campaigns on content network this year:

Month------Clicks-----Impr.-----CTR-----Cost
Jan----------38-------4,771----0.79%----$1.94
Feb----------81-------7,972----1.01%----$4.02
Mar----------84-------6,651----1.26%----$4.31
Apr----------64-------4,974----1.28%----$3.20
May----------86-------4,846----1.77%----$4.41
Jun----------113------17,498----0.64%----$5.64
Jul-----------61------11,311----0.53%----$3.07
Aug----------200-----115,559----0.17%---$12.78
Sep1-15-----264-----125,646----0.21%---$16.40

It was so strange. Impr for Aug increased almost 20 times than the months before Jun. Half time of Sep shows even more impressions. I was so confused about the data and worried about the cost, so I have just stopped showing my ads on content network. Waiting for a response from Google, I was wondering if someone here could let me know the reason why this could happen.

The number of sales coming from Google Adwords is almost the same for the past few months. So I don't think the increased cost helped me.

Would really appreciate any help here. Thanks a lot.

[La_Valette]

As per another thread, ads on the content network are showing "accidentally" on the search network these days; I understand that google is working on a fix.

When this happened to me, the number of impressions my content ads got mushroomed in a similar way. The CTR went down. Same pattern as you.

[Pengi]

I've seen some sudden, very high peaks on content impressions for one or two AdGroups that just seem to last a day or two - possibly a 4 orders of magnitude in the impressions I normally see. Obviously this completely dominates my stats for the period.

I put it down to my Ad appearing on a specific, highly popular site for a day or two.