I'm not sure when does it happen.It doesn't always occur,I think it has nothing to do with my operation.
Nevermind, we already fixed it in code (it isn't yet in the build).
I have tried the P2P trade,I found I can only make deal with somebody who offered the same amount and the same price.
Yes. Basically, we didn't bother with partial fills yet.
Can I buy some assets from others who sell lower price than my offered and higher amount than mine?
Eventually.
Another question,what does atom and unit mean when issuing a asset .
That dialog is rather confusing, we'll change it in new version.
Basically, "atoms" is number of satoshi in one unit. "units" means how many units you want to issue, i.e. quantity of units.
Where does the colored btc go and colored BTCs can be uncolored and used again?
NGCCC just tracks which addresses are colored and which aren't. If you no longer need colored coins it could just sent them to uncolored address, but it isn't implemented yet.