Why are TTL compensation numbers on the strobes and triggering device different?

When in Manual mode the power adjustments on the trigger are seen in real time on the strobe.  In TTL mode the trigger and strobe act independently. Setting your strobe at -1 and your trigger at +1 will result in "0" compensation.  This can be useful when setting personal preferences for exposure and refining individual camera and lens combinations for more consistent TTL results.  You can enable both the strobe compensation and trigger compensation to be viewed on the FJ400 (not available on the FJ80 or FJ200). Go to menu 6 (settings menu) by long pressing the top (menu) button.  Press the select button and set the TTL-M option to "ON".  Press the menu button to return to menu 1.  If in TTL mode you will see 3 numbers.  The large numbers are the FJ400 strobe compensation setting.  The first set of small numbers is the trigger compensation setting.  The third number is the Manual equivalent for the last TTL exposure in group "A" provided you fired the strobe via the camera's shutter.  

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