As I suspected, the offline file you have doesn't show the current hardware configuration.
What probably happened:
Someone removed the cards shown in slot 4 and 5 in your original offline hardware config image, and downloaded this hardware config to the PLC, but didn't give you a copy.
You can still go online with the project and go online and see code and upload if it doesn't match, but this doesn't change the hardware config. So you can have the wrong hardware config in your file and not notice.
The problem would have came if you tried to download this incorrect hardware config at some point.
Anyways, yes it is normal for the "Model name" to not be filled in, you can just fill this in manually. But what you have to do now is add the new analog card to the UPLOADED hardware config, then download. Keep in mind with most of the Mitsubishi programs I have worked on, there are two ways of configuring a card:
1. Using the switch/detail setting in the menu you have open
2. In the Ladder program, move values into the Head address of the card
I would search for the Head address of some of the other cards and see if they are moving parameters in using the ladder program. Then you can configure the analog card the same way. Or use the menu in GX Developer that I just mentioned.
Good luck.