Not picking on you, here. Just trying to explain the phenomenon you are experiencing.
From the patch notes about the Daily Deals…
Daily Deals will contain 3 different offers that players will receive:
Player Level Offers: These offers contain different items based on a player’s level. Players at various stages of the game tend to focus on getting different rewards, so these offers have been set up to help them.
Kingdom Offers: These offers are designed to assist players with working towards completing their Kingdom Power Tasks.
VIP Offers: These offers are available for players who are VIP 6 or higher. They may either offer rarer rewards (such as Orbs) or other things at a discount.
If a player doesn’t have any eligible Kingdom Power Tasks, the daily deals will select another Player Level Offer instead of a Kingdom Offer, so players will always have 3 offers.
The Manticore Cub shows up in the second slot, always, because the daily deals system is hard coded to go through a checklist of requirements to determine what gets offered in that slot (kingdoms stuck on pets, troops, champion levels etc.). If that list is short, it is quite possible that you are receiving that deal because there is nothing else for the system to offer you in that slot. NOTE: Per the last bullet point above, for the second slot to offer any other type of offer, there has to be literally nothing that the game can offer the player at that point in time that meets any of the Kingdom Power requirements.
Using an timely example from my account today, after adding the new faction’s troops to Dhrak-Zum, the kingdom power screen show the following:
Before today’s event, there were no kingdom offers I could be offered so my Daily Deals would roll a second player level offer in that slot. But, because there now is a eligible pet offer available, I’ll be receiving Rockweilers in the second slot every day until I finish leveling the pet because it is the only kingdom power offer the game can offer me (thus a 100% chance it gets rolled daily).
You’re likely in a similar situation with Manticore Cubs.