—
Plugin LayoutToBoard is used to put all tiles/chess into a rex_board. It will calculate the logical position of all tiles/chess by their related pixel position. It is incorrect in your case since there is only 1 tile put into the board, it is considered to (0,0) always.
You might try "action: Add chess" of rex_board plugin, to add chess with logic position ( Expression:LogicX , Expression:LogicY ) provided by tmx plugin.