In Monaco's case they didn't register a single televote, and the computer system broke down and made up a fake result. They are not sure why there were no votes but they think there was a technical error and the lines weren't opened.
In the Croatian case the sms votes tried to give Croatia 4 points and the mistake wasn't caught by the Croatian Telecom provider.
A new rule has therefore been introduced. Each televote in each country has to receive at least 100 votes in order for it to be valid. Otherwise the jury votes are used instead.
Svante & Co looked very tired, they've been up all night poor dears."
Make of it what you will!!
EDIT: Follow-up explanation (quoted from esctoday.com)
It was explained how there is a six minute window in which to gather results, sift and sort through them before finally drawing up a table of results and presenting them with a delay of five seconds. When it came to Monaco, the results came back as 22 ‘nil points’ indicating that not one person had voted in Monaco and that Monaco therefore awards no points. The EBU then called up Monaco and had them double check results and send confirmation that this was the case. Monaco replied saying it was, and that not one person voted. The problem, they stated, was technical. However at the time due to the confirmation and the double check these results had to be accepted. Usually in a case of emergency the votes of a country would be deleted and the back up jurors votes used. However official confirmation meant an obligation to accept