I bought 550 tokens with the first buy (ie just trying it out) I was waiting on the referral code from you before buying anymore and decided that if i didn't get the code I would just go with what I had, which is what happened. The coins have paid out once (0.37 NEBL) and I have been learning the ins and outs of how to keep your wallet staking. For some or other reason it appears to lock itself again from time to time. As best as I can tell it is if you close the application.