Looks like it's going to take 24 hours for super high to kick in.

Myself and any others who attempted to game the system by saving up stake all week    and minted it this morning after super-high went live were quite disappointed to see we only received stake at the normal 10%APR instead of the super high 2%/day rate.   Essentially, what we did was waste a bunch of potentially super high blocks for regular stake.   Hopefully, now that the wallet has been staked and coin age reset tomorrow we be should minting at the super high rate.   I'll let you know in about 20 hours if it's working out or not.

my guess is that, what you minted is correct since your coins have not been in wallet 24 hours in this 2% window.
meaning that you will get normal 10%/year for around 20 hours and that 2%/day for like 4 hours.

This is just my guess. i don't know any better.

day before yesterday i sent all my coins from my wallet to myself to get only one amount of coins to mint at time, they minted after 24 hours and then that mining icon told me same "not minting because you don't have any mature coins"
after another 24h it minted again.

so i don't think you have anything to worry about.

correct me if i'm wrong.