[R] Adding multiple polygons to a Leaflet map

[Kevin Haynes]

Hi everyone - I'd like to add multiple polygons to a leaflet map. I don't
get any errors when running this code, but it'll only display the second
choro layer - the citizenship rate one. Here's my code below. Any thoughts?
Here's the map right now:http://rpubs.com/khaynes17/205217
  #map

  la_trad_school_perf_map_layers <- leaflet(lac_schools) %>%
    addProviderTiles("CartoDB.Positron") %>%
    setView(-118.4, 34.05, zoom = 9) %>%
    addCircleMarkers(
      radius = 3,
      color = ~pal(metandabove_mth),
      stroke= FALSE, fillOpacity = 0.5,
      group="14-15 Proficiency Rates - Math"
    ) %>%
    addPolygons(data = income_merged,
      fillColor = ~pal_income(MedianIncome_2014),
      color = "#b2aeae",
      fillOpacity = 0.5,
      weight = 1,
      smoothFactor = 0.2,
      popup = popup_income,
      group="Median Income - 2014")%>%
    addPolygons(data = cit_merged,
      fillColor = ~pal_cit(non_citizenship_rate),
      color = "#b2aeae",
      fillOpacity = 0.5,
      weight = 1,
      smoothFactor = 0.2,
      popup = popup_cit,
      group="Non-U.S. Citizen - 2014")%>%
   addLayersControl(
     baseGroups=c("Median Income - 2014", "Non-U.S. Citizen - 2014"),
     overlayGroups=c("14-15 Proficiency Rates - Math"),
     options = layersControlOptions(collapsed = FALSE)
   )
  la_trad_school_perf_map_layers

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