Index: trunk/src_plugins/export_xy/xy.c
===================================================================
--- trunk/src_plugins/export_xy/xy.c	(revision 35877)
+++ trunk/src_plugins/export_xy/xy.c	(revision 35878)
@@ -711,7 +711,7 @@
 	/* translate the xy coords using origin */
 	*dstx = x - ctx->ox;
 	*dsty = ctx->oy - y;
-	*bottom_dstx = x - ctx->bottom_ox;
+	*bottom_dstx = ctx->bottom_ox - x;
 	*bottom_dsty = ctx->bottom_oy - y;
 }