or however many days worth of that 10,000% it takes till you find a block  I can't see 25 coins making it to the 16 day limit.

and what happens if a batch of coins reach's past 16 days? does it start over? or does it keep the 16 days worth of weight until it finds a block?

Seems it depends upon the stake weight your total amount of coins give to the whole network, as I was staking faster when I was having 1k coins, and now I have 200 coins and staking slower, but yes, whether you stake fast or slow, your 27-30% per day is guaranteed as you will surely get them in a go in just one single transaction if you haven't received any rewards in past 24 hours. Also, am eager to ask you 1 silly question, did you leave your wallet open though for it to stake?

more then 24 h no stake  

good