You can think of staking as entering a lottery every block to win the block reward. Therefore, there is no guaranteed reward at a specific time. The “expected time” shown in the staking wallet is a calculation based on your probability of winning the lottery (i.e. your staking weight compared to the overall network staking weight). For example, if your estimated time to win a reward is 16 days, you can think of it as a 1 in 16 chance of winning a block each day. Or a 1 in 10,800 chance of winning any individual block (calculation: average block time is 128 seconds. In 24hrs there’s 24 x 60 x 60 = 86,400 seconds, divided by 128 = 675 blocks, and multiply by 16 to get the probability of winning any single block). Sometimes it may take up to 5 or 6 times longer than your estimated time to win a block, sometimes you may receive 5 or 6 rewards in the estimated time to receive one. This is the nature of mathematical probability. If this does not meet your expectations, we recommend staking on pool-x.io, where you will receive guaranteed regular payouts.