Whatsapp restoring from iCloud not working

Hi,

I have had a problem with my whatsapp and I am trying to recover my chat history from iCloud. I backed up my iphone on iCloud two days ago but when I try to restore my whatsapp it says that my iCloud backup inside whatsapp is from 3 months ago. I don't understand what's the difference between "iCloud documents & data backup" (that includes a copy of whatsapp sizing 4Gb and was done 2 days ago) and the iCloud backup that you can do inside whatsapp (preferences->chats->chats backup) that sizes 800Mb and was done 3 months ago. When I start whatsapp I'm not able to choose "iCloud documents & data backup" and it just let me choose "whatsapp iCloud backup". Thats really tricky! Could anybody help me?

I have an iPhone 4 and iOS 7.1.2.

Thanks a lot!