Here's the IRC log, in case anyone else is interested in how we sorted it out:
01:42 < dooglus> paul:
http://khashier.com:2750/address/xL1vCQ2Xbwg5mz7tvte4hXcMfBKKfgQr4D01:42 < dooglus> you see it's been staking regularly
01:42 < dooglus> every 4 days or so
01:42 < dooglus> it's due...
01:43 < dooglus> 'not yet redeemed' just means the current output hasn't staked yet
01:43 < dooglus> (or otherwise been spent)
01:43 < paulc010> Yes it was. Maybe it's my ignorance of how these things work but I added new coins in 5 coin piles and they've staked before those.
01:44 < dooglus> it's random
01:44 < paulc010> Ah - right that makes sense. I went to check on others but the explorer was down
01:45 < paulc010> See I'm thinking 5 coins at 3k confirms would stake after 3.4 coins at almost 8k confirms
01:45 < dooglus> see this one:
01:45 < dooglus>
http://khashier.com:2750/tx/36012e5359b1834e20a45d6dec3e1aff81d9da76c96b6860dc24640b564e9534#i001:45 < paulc010> But two of them staked today
01:45 < dooglus> 130 different 5 CLAM outputs
01:45 < dooglus> some staked, some didn't (yet)
01:46 < dooglus> (looking at the 'redeemed at input' column of the list of outputs)
01:46 < paulc010> (that should be 4.3 not 3.4 of course)
01:46 < dooglus> every second, each output has a chance of staking, proportional to its age and its size
01:46 < paulc010> Yup - I see it now. Just didn't have a clue what that meant
01:47 < paulc010> Hence the CPU load you mentioned in the thread
01:48 < dooglus> the 'not yet redeemed' turns into a link to the transaction in which they staked (or were spent) once they stake (or are spent)
01:48 < paulc010> Got it
01:48 < dooglus> so click the link on output 13 - you see the 5 staking into two 2.55's
01:48 < dooglus> (nether of which has since yet staked again)
01:49 < dooglus> if you trace
http://khashier.com:2750/tx/b74eb0568ed7727c3da8c40eee8083eed615ddc7ed2bbe5a29872965a9f919fc you'll see it split over and over as it stakes
01:49 < paulc010> OK
01:49 < dooglus> halving each time - until I finally remembered it when it was mature and split it into those 5's
01:50 < dooglus> oh, I got output 2 right away, but not output 1
01:50 < paulc010> I was about to ask why it split into 5s lol
01:51 < paulc010> Normal behaviour would be for it to halve each staking, yes?
01:51 < paulc010> Ah, looking at the other one it's halving