The client can't refresh synchronously, I must close the client, reload, then the transactions will all be shown.
Not at all sure what's the cause of that. We do have an issue tracker for these kinds of things so our team can look into it later in detail.
https://github.com/fimkrypto/fimk/issuesHow to understand this:
Account FIM-MRCC-2YLS-8M54-3CMAJ Info
The account has a balance of -666'279'998 FIM.
Thats the genesis account
Can you register an alias as you can with NXT?
Yes you can but i'm currently fixing a bug in the html/javascript client that does not allow to register account aliases.