@OP
nothing suspicious, nothing manipulated just your observations are badly interpreted and your suspicions a bit paranoid.
Some of the coins have values right on the extreme end of the reportable range,
value BTC= 0.00000001 for instance, thats the smallest it can be displayed, how can a 25% change be represented? it cant, you going to get big differences when multiplying up with large coin values.
Market volume in the region of $2-3, for the whole world, one trade for a dollar and the results will be all over the place.
Also, is any body buying these coins? The predictions are meaningless if there is no actual trading.
Shit coin > shit data > shit results
Baz
You got it right.
I see now that its not that cryptunit is sucha bad calculator, its probably that it has bad coins and bad data. I do hope the developers becomes more active and really does the necessary research on what coins to list. The user interface and features are really nice and would be a shame to waste it on shitcoins.