[2020] the recent news post was signed just as " The Old School Team" not listed all the j mods like normal does this mean anything?

Nope, we normally do that for announcement style posts because it looks cleaner and focuses attention on the announcement rather than the signature. Similar to this one just a few days ago: https://secure.runescape.com/m=news/100k-for-mental-health-how-to-get-involved?oldschool=1