MySQL left join query
===

I have a relationship table in my database that has four values AKA...

    id, int, primary, auto-incriment 
    mem1, int
    mem2, int
    type, enum('a','b')

I also have another table that has the members id, username, firstname, and lastname

I want to click a button and get the relationships between the two people without duplicates.
Here is the query I have so far...

    SELECT 
    	myMembers.id AS id, 
    	myMembers.username AS username, 
    	myMembers.firstname AS firstname,
    	myMembers.lastname AS lastname 
    FROM myMembers 
    INNER JOIN memberRelations 
    	ON memberRelations.mem2=myMembers.id
    WHERE memberRelations.mem1='$id' OR memberRelations.mem2='$id' ORDER BY myMembers.username 
    ASC

The problem here is that on some users it gives me the correct values, but on others it gives me the profile user and not the other member relationship. I suspect this has to do with the ON portion of the query, but truthfully I am lost! Is there a better way to accomplish my goal? Or can I just correct something in my query? Any help would be greatly appreciated. Thanks!