Yes‚ it's normal. Because the original Flight‚ Hotel‚ Vacation Package or Flight & Hotel booking was made under your My FlightNetwork® Account‚ you now control both the earning and spending of any Price Drops for your sub-travellers.
If you have grabbed a deal‚ you are grabbing that deal for yourself as well as any travellers in your account on the same booking. You also now control their Price Drop Protection™ Dollars and only you can spend it for them.
If you don't want to be in charge of spending Price Drop Protection™ Dollars for them‚ travellers can also be split off of your My FlightNetwork® Account onto an existing My FlightNetwork® Account.