Yanukovich may still be considered the legal state of Ukraine - if he's been impeached illegally, then he was still the president and there couldn't have been new presidential elections until his mandate was over.

It's acceptance of the reality. Like Kiev still considers Crimea part of Ukraine, or Belgrade Kosovo a part of Serbia, but both know better then to send army there, for instance.

You made it sound Putin admitted that operation to annex Crimea was started while Yanukovich was still in power, which wasn't true. Putin said, on morning of 23rd, that Russia must ensure that Crimea can decide its future in peace and safety. By that time Yanukovich wasn't in power or had any control, Maidan rebels seized power, although he was still legally the president.

Considering the massacre, it was pretty explicitly mentioned that, according to Kiev, there were 7 confirmed murders.

Believe or don't believe Putin, that is your prerogative. Not believing politicians is usually a safe bet, but don't twist facts to suit your agenda.