Pablo,
Configure terminal simply gets you into the global editing section.
Configure self gets you into the device's 'override' section. Any commands/values you enter here will override the value that is configured in the device's global Profile (or anywhere in the global config section).
This device override section is where it's completely expected to enter a device hostname or the device's static IP address. Those are values that you wouldn't put into a Profile, right? Otherwise, every device that received that Profile would have the same hostname and static IP address.
Best practice though is to keep as much as possible in the main device global Profile...and only put things into the device override as-needed.
