SQL Server Count Function Misbehaving

I have a query where I need to get two counts from two different tables.  

select a.BlogPostDate,c.CommentPostDocumentID,b.BlogPostID,a.DocumentID,
Count(b.BlogPostID) NumberLikes,
Count(c.CommentPostDocumentID) NumberComments
from View_Blogs_Joined a
join customtable_BlogPostLikes b on a.DocumentID = b.BlogPostID
join Blog_Comment c on a.DocumentID = c.CommentPostDocumentID
group by a.DocumentID,a.BlogPostDate,b.BlogPostID,c.CommentPostDocumentID

What I am getting back for my counts is a  cartesian product.  The View has 4 records only.  The product is coming in when I join both the counter tables to the View on the same field.  I don't have any other candidates for a match other than the DocumentID.  Any ideas on how I can get the two counts.  I tried a union, but I am getting all the counts back in one column where I need two columns.

Thanks in advance.