Yes, thats normal behavoir. Its standard to have to seperate parameters from the commands in all types of programs.
There is nothing wroung with the way plus handles it.
Because it things you are using /skiss as the command not /skiss as the command and as the parameter.
And i really doubt patchou will change the way this works (Why would he ?)
/ –
as the command not /skiss as the command and 
