Hi Juanito
I see 2 odd things here:
 ... it corrects when you type STARTX again! ... 
The  pstree  command in the left terminal appears to show  wmaker  starting a second instance of  wmaker.
The  wbar  at the bottom of the screen appears to be overlaying a second set of icons, possibly supplied by  wmaker. Maybe he
shouldn't be loading  wbar.