Nope, Page2 should show a link back, a 'from' link.
There are two types of links, to and from. By default, when you link one post to another, the second post will have a 'from' link, no matter what. This is what is listed in the second post. This is not reciprocal, but a one way link. (from -> to)
To be reciprocal, both link must be 'to' links. They both link to each other. (to <-> to)
What you have currently is what you want. It is non-reciprocal. Pages have the ability to link to each other, but one link is the dominant one, showing a one way connection. (that is why there is to and from labels).
If two pages are connected, it will always show a link on both pages, whether it is reciprocal or not. A submissive page will still show where it is linked from.
Here is a real world example from the docs. It shows why it "links back." Even though an employee doesn't manage the manager, there is a need to show who manages the employee. If both employees managed each other (to <-> to), then it would be reciprocal.
'name' => 'employee_manager',
'from' => 'employee',
'to' => 'employee',
'cardinality' => 'one-to-many',
'title' => array( 'from' => 'Managed by', 'to' => 'Manages' )