Offer Upgrades versus not upgrade

[Frogger22]

Is anyone savvy about the nuances between an offer upgrade and just purchasing more items. For example:

Offer Upgrade for wifi is109.93 (but looks like both people in the room have to upgrade??) versus unlimited wifi for 1 device at 178.98 (but can select 1 of 2 people in the room)

Offer Upgrade for 2 more Specialty dining is 70.80 versus purchasing two meals for one person at 106.80 (but can select 1 of 2 people in room)

 

The free at sea plus offer upgrade is interesting bc it includes premium plus beverage package, internet, shore excursion, specialty dining but that two has to be added to both people in the room and I am booked with my 14 year old son so $343 per person seems high with a minor. 

 

I am pricing all this from the app, which does appear to be a little wonky right now. Thanks in advance for any insight! 

 

[Frogger22]

Update: I logged on through the website and it looks like with the "upgrade" there I can either pick myself or my son or both so I think my question was just an issue with the App, apologies!

[hallux]

The "upgrade" items are if you're buying it to add on or upgrade the FAS item that you're already getting.  The other is if you were just going to buy it outright.