Who every have this problem.
First, you need to follow what danielfromspringfield above.
But some of them might not be able. Because of belows.
If your documents are too complicated. You might have potential not sync after all above.
You need to duplicate the documents, and move to your computor instead of icloud.
And delete the original form icloud.
And perform what danielfromspringfield above.
And move the new document to icloud.
You will find it sync again.
To avoid future problems.
I suggest if you have complicated documents.
When you open the documents from your iphone or ipad.
Open a copy instead of open original one.
As no matter how go is the sync.
It is 2 different operating system.
You should not have problem if you open a copy.
I think soon should not have this type of problem since iphone and ipad moving to 64bits.
It should be able to become a same program for iwork.
And a comment to the person who think people jump ship to google docs.
There are plenty of clouding docs around. You can choose whatever you want.
Those are for people never really need to work on documents on the move.
Who really need to work on many documents on the move, all others are not working at all.
You can't even use it if you don't have internet connection.
So what you going to do, if your client want to meet you at a basement restaurant.
What, tell them too bad, I need somewhere have free wifi or 4G connection to dine in.
Only apple iwork can perform this type of work
Now even have the iwork on icloud