It is recommended that clients attempt to seperate the extra variables that they chose to save in FXP.One. However, there are situations where a global common is useful. Generally, if client "clomps" needs to save variable "sortby", it is recommended that the client uses "clomps_sortby=date", instead of just "sortby=".
Since essentially Extra Site and Client Site commands are the same thing, they are separated because Extra Site lists additional commands which the FXP.One engine will act on. Where as Client Site commands are stored by clients, for clients. The FXP.One engine does not parse these key/value pairs.
The following is a list of examples that clients could use:
UFXP_left_sortby=-date UFXP_right_sortby=+filename UFXP_Maximized=true