The Server Validations server behavior isn't applied on this page at all... You need to add the server validations first before you can add Show If server behaviors to respond to it.
The way it works is:
1) You apply the Server Validations server behavior to validate the form elements in the form. Adding each of the fields you want validated into a single application of the server validations server behavior
2) You apply the Show If server behavior to respond to any of the server validations you applied in step 1