I understand your anger Piotr. The way in which this was done with no prior warning that I saw, was totally wrong.
For most people keeping track on which key is for what doesn't come easy.
But having considered it today I can see why it was done. 
As steem grows in value there is obviosly a need for the highest security.
I myself use a password manager and even so it can be difficult setting it up up to use the correct key.
The people at steemit need to up thier game before we lose members.

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