the legend order

Hi,   When I set up the legend, I have a strange problem. The lables of legend are supposed to match with the colors, ie LE_OBS: red, LE_CTL: green,LE_BT: black. But I got  a disordered legend. Please see the attached file. And the script is as below.   How can I fix the problem? Thanks.     wks   = gsn_open_wks ("pdf","200907_LE")                ; open workstation     res                  = True                     ; plot mods desired ;  res@xyMarkLineModes   = "MarkLines"   res@xyMarkLineModes   = "Lines"   res@xyDashPattern = 0               ; Make curves all solid ;  res@xyMarkers          = 6 ;  res@xyMarkerSizeF     = 0.005 ;  res@xyMarkerColors      =(/"blue"/)   res@trYMinF          = 0   res@trYMaxF          = 300     res@xyLineColors      = (/"red"/)   res@tiMainString      = "Monthly Mean Flux Daily Variation"          ; add title   res@tiXAxisString     = "Time"   res@tiYAxisString     = "Latent Heat Flux(W/m~S~2~N~)"   res@gsnDraw           = False   res@gsnFrame          = False   plot0  = gsn_csm_xy(wks,t0,LE_OBS,res) ; create plot   res@xyLineColors      = (/"green"/)   plot1  = gsn_csm_xy(wks,t,m,res)   res@xyLineColors      = (/"black"/)   plot2 = gsn_csm_xy(wks,t,n,res)   overlay(plot0,plot1)   overlay(plot0,plot2)     lgres             = True   colors = (/"red","green","black"/)   lgres@lgMarkerColors = colors   lgres@lgItemType   = "lines" ;  lgres@lgMonoMarkerIndex = True ;  lgres@lgMarkerIndex    = 4 ;  lgres@lgMarkerSizeF  =0.005   lgres@vpWidthF     = 0.13   lgres@lgLabelFontHeightF =.08   lgres@vpHeightF = 0.10   lgres@lgPerimOn = False ;  lgres@lgPerimThicknessF = 2.   lgres@lgMonoDashIndex = True   lgres@lgDashIndex = 0 ;  labels = (/"LE_BT","LE_OBS","LE_CTL"/)    labels = (/"LE_OBS","LE_CTL","LE_BT"/)     legend = gsn_create_legend(wks,3,labels,lgres)   amres = True   amres@amJust = "ToPLeft"   amres@amParallelPosF   = -0.5   amres@amOrthogonalPosF = -0.5 ;  amres@amPerimOn              = False               ; turn off box around   annoid = gsn_add_annotation(plot0,legend,amres)   draw(plot0)   frame(wks)   end

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