[THE_KNOWN]

if(anumber < 1 || anumber > { SendClientMessage(playerid,0xFF0000FF,"USAGE: /cheer [1-8]"); return 1; }

try changing that to

if(anumber < 1 && anumber > { SendClientMessage(playerid,0xFF0000FF,"USAGE: /cheer [1-8]"); return 1; }

in /cheer... if it works do the same in /dance


and for second question...

MoveObject(..) all the objects u want like

MoveObject(internal one, ....0);
MoveObject(external one,...);