The wallet has really an issue... I receive stake last time but I haven't seen the staking arrow showing green color, it just always says staking not active, multi-send not active
This is because none of your coins have a minimum stake age of 7 days. As soons as they reach 7 days old staking will turn green and you will get stakes until you run out of "old" coins again.
As soon as you run out of "old" coins you will loose staking status and the process begins again.
I have to say that the minimum 7 day age thing was a pretty bad decision by the devs, it has caused major confusion and problems.
It's not so much that as it is the lack of communication from devs. The end result has been that the community has been left to pick up the slack in the support department, and given we didn't develop the coin, we've been left trying to help people with our best guesses a lot of the time. Now, we've been able to solve most issues simply by working things through, but without anyone to confirm/deny certain things there has been misinformation and conflicting information spread on a number of issues. The uncertainty surrounding staking times for example is a prime example of this and is something that should've been answered long before people started to lose their minds over it. I have voiced my concerns over this a few times now, but the good news is that these concerns seem to have been taken on board, with a community member (skadoosh1) receiving an email from sudo23 announcing his return from travel inside the last day and also Th82 providing support in this thread.
In the meantime, if you need help please come to the Slack and we will do the best we can to help you. We have been able to solve almost every issue that has been brought up in there so far.
Overall I tend to agree that it has been a very frustrating experience for many of us and I hope the return of sudo23 marks the end of this chapter and the beginning of what we were promised in the beginning with this coin. This coin still shows great promise as you well know.
Cheers