Yes, this does happen. Normally a plea of guilty will be on a "full facts" basis - ie the facts as outlined by the prosecution. However, the prosecution may take a view and accept a plea on a limited basis for example, the prosecution case may be that the defendant hit the complainant 4 times over the head and kicked him once; the defendant may say, OK I accept I punched him 4 times, but he was never kicked - exactly as you said in the question. I am surprised though that the basis of plea was not sorted out at the time since it is a relatively simple matter in a case like this to determine. But it is possible that the lawyers who dealt with the plea may not be the same lawyers in court for the sentencing. If a full note has not been made, it would be necessary to go back to the original lawyers for clarification. Either way, it looks as if a guilty plea has been entered.