Dammit, gotta send it all to cryptopia again to get it all in 1 wallet. I did that b4 to move up on the rich list but i sended 200.000.000 to nova and for some reason the wallet sended 300.000.000 and put 100.000.000 back in my wallet but a different adress...
Certainly not! Just use coin control features to make payments to yourself. Google how that works, its actually easy and useful. Look for coin control info on bitcoin core qt wallet as its the same thing
You have to enable the feature somewhere in the client first.
Now as to why that happened, I guess you had somewhere a large payment of 300m in your wallet (probably the giveaway). Chunks of coin have to be spent entirely when used. So you wanted to pay 200m, the remaining 100m has to be spent as well, so it is paid to yourself. I think it is paid to the first address on the list of your addresses.
Anyway, coin control gives you absolute control over such things