Hi Amy,
Actually I have tried same Ad Unit on iOS for same ad sizes but its result is same.
It is not displaying correctly on iOS too.
If I request only for one ad size it works correctly.
I have researched on this group an I have found people suffers from this issue.
I realized that SDK's "adView:willChangeAdSizeTo:" method returns wrong ad sizes.
Some time this method returns 300x250 ad size but it loads and shows 320x50 ad size.
I have found below link about this issue:
And another reason may be DFP configuration for this ad unit.
I am using v6.12.2 SDK (last version).
Thanks.
Fatih
27 Aralık 2014 Cumartesi 03:51:33 UTC+2 tarihinde Amy Quispe (AdMob SDK Team) yazdı: