Hello,

Well, these messages are self-explaining.

First message means that the export package you are importing comes from an older version that the current instance. It should not be a problem for our objects, as it is backwards compatible, but you should keep this in mind when importing custom objects. The reason is that something may have been changed since previous version, typically API, so you should keep this in mind and update your custom code if necessary.

Second message means that if you are importing some objects which already exist in the target instance (like users, page templates, and so on), they will be overwritten if you check their checkboxes.

Best Regards,
Radek Macalik