Why does my 728x90 unit always display 468x60 ads?

[Archbob]

So I just recently realized this was happening and is probably the cause of such poor performance since about 2 weeks ago. My 728x90 spots are always showing 468*60 ads and obviously the smaller size has less CTR and pays less. Anyone else have this issue?

[robzilla]

If no 728x90 ads are available, a 468x60 ad may be shown because it fits in the slot.

That also goes for other compatible sizes.

Make sure the container is large enough to actually fit a 728x90 ad.

[freitasm]

Are you using DFP?

[Archbob]

Pretty sure the container is large enough and the spot was showing 728x90 ads before.

[Archbob]

How does DFP compare to just running adsense?

[robzilla]

Is this based only on what you see, or have you found confirmation in your Performance Reports that fewer 728x90 ads are being shown?

[Archbob]

What I see, also the Ctr rates and earnings are at an all time low.

[robzilla]

Performance reports > Advanced reports > Ad sizes, click 728x90 to get a line graph.

(And then compare that with other sizes, of course.)