You are on the right track, IMO, to fix the latch. There may be a birth injury that required gentle, baby-type manipulation. 
It could be self-defense against a "garden hose" letdown. OAMER is very common in tandem nursing. 
Some moms always have the older baby nurse first so the newbie gets the higher fat, slightly slower flow milk. But this older baby only nurses 2x a day. 
Other moms assign a breast to each one. It does leave mom lopsided, but each breast will adjust to the demand placed on it. 
The primary risk I see is the possibility of plugged ducts on the side assigned to the older baby because of the change from very frequent feeds to occasional feeds. That could be resolved or avoided with a little "pumping to comfort".

Phyllis
... speaking as one who had OAMER and did tandem nurse

--
Phyllis Adamson, IBCLC, RLC
Glendale, AZ.
[log in to unmask]

             ***********************************************

Archives: http://community.lsoft.com/archives/LACTNET.html
Mail all commands to [log in to unmask]
To temporarily stop your subscription: set lactnet nomail
To start it again: set lactnet mail (or [log in to unmask])
To unsubscribe: unsubscribe lactnet or ([log in to unmask])
To reach list owners: [log in to unmask]