SharePoint - High availability of APP server

Hi there,

In my SP 2010 farm - I have two APP servers APP1 and APP2 (for high availability). Both of these run ALL SharePoint services.

I notice that the SharePoint Server Search and the User Profile Synchronization Service both are running only on APP1.
AND
If I try to start above two on APP2 as well then these services stop on APP1.
That means
These can start only one one server at a given moment?

If APP1 goes down - I will have to manually start these two services on APP2 <-- Is this the only way? Are there any better ways so this manual step can be avoided?

Thanks so much.