diff --git a/beakerx/beakerx/plot/chart.py b/beakerx/beakerx/plot/chart.py
index 354a8d73cf..e5cf52ca69 100644
--- a/beakerx/beakerx/plot/chart.py
+++ b/beakerx/beakerx/plot/chart.py
@@ -442,8 +442,8 @@ def __init__(self, **kwargs):
     
     def add(self, item):
         super(NanoPlot, self).add(item)
-        converted = []
         for l in self.chart.graphics_list:
+            converted = []
             for x in l.x:
                 converted.append(str(x))
             l.x = converted
diff --git a/js/notebook/src/plot/plotUtils.js b/js/notebook/src/plot/plotUtils.js
index 28fac31448..cb63ad31e1 100644
--- a/js/notebook/src/plot/plotUtils.js
+++ b/js/notebook/src/plot/plotUtils.js
@@ -194,7 +194,7 @@ define([
         datarange.xl = datarange.xr - 1;
       } else if (datarange.xr === -Infinity && datarange.xl !== Infinity) {
         datarange.xr = datarange.xl + 1;
-      } else if (visibleItem === 0 || datarange.xl === Infinity) {
+      } else if (visibleItem === 0 || visibleItem === 1 || datarange.xl === Infinity) {
         datarange.xl = 0;
         datarange.xr = 1;
       } else if (datarange.xl > datarange.xr) {