Can't Get The Right Join

I have two tables (terrible data architecture I know...) One table itemsShipped one table itemsDamaged.  I need to get a count of item from itemsDamaged in my query, but when I use an Inner Join (or an outer, or a left, or a right) I keep getting inaccurate results.  Below is my query...

Select
a.item, COUNT(b.item)
From itemsShipped a
Inner Join itemsDamaged b
On a.ID = b.ID 
GROUP BY a.item, b.item
Order By a.item ASC