I read this as carefully phrased evidence that investigation led by Egyptian officials is carried by them without real cooperation with all other parties presented. And that at least Russia sent separate rescue/investigation team, under EMERCOM control/roof, which carried out it's own investigation.
"This report has been sent to all Accredited Representatives for the States that have the right to participate in the investigation" I read as "this report was composed by Egyptian team and even was not read yet by other countries investigators".