diff --git a/src/button.lua b/src/button.lua
index 776ec20..a505eea 100644
--- a/src/button.lua
+++ b/src/button.lua
@@ -14,6 +14,14 @@ function self.kget(key)
   end
 end
 
+local function nillify(tab) -- dumb hack. turns `false` into `nil`
+  local t = {}
+  for i,v in ipairs(tab) do
+    if v then table.insert(t, v) end
+  end
+  return t
+end
+
 local buttonId
 local function insertButton(tab, f)
   buttonId = buttonId + 1
@@ -41,11 +49,11 @@ function self.createButtons()
         if mode == modes.preview then
           local e = ease.eases[dropdown.kselected('ease1')]
 
-          param1[1] = slider.kvalue(e.name .. 'param11') or (e.params[1] and e.params[1].default) or 1
-          param1[2] = slider.kvalue(e.name .. 'param12') or (e.params[2] and e.params[2].default) or 1
+          param1[1] = (slider.kvalue(e.name .. 'param11') ~= (e1.params[1] and e1.params[1].default) and slider.kvalue(e.name .. 'param11'))
+          param1[2] = (slider.kvalue(e.name .. 'param12') ~= e.params[2].default and slider.kvalue(e.name .. 'param12'))
 
           local p1 = ''
-          for i,v in ipairs(param1) do
+          for i,v in ipairs(nillify(param1)) do
             p1 = p1 .. (i > 1 and (', ' .. v) or v)
           end
 
@@ -54,17 +62,17 @@ function self.createButtons()
           local e1 = ease.eases[dropdown.kselected('ease1')]
           local e2 = ease.eases[dropdown.kselected('ease2')]
 
-          param1[1] = slider.kvalue(e1.name .. 'param11') or (e1.params[1] and e1.params[1].default) or 1
-          param1[2] = slider.kvalue(e1.name .. 'param12') or (e1.params[2] and e1.params[2].default) or 1
-          param2[1] = slider.kvalue(e2.name .. 'param21') or (e2.params[1] and e2.params[1].default) or 1
-          param2[2] = slider.kvalue(e2.name .. 'param22') or (e2.params[2] and e2.params[2].default) or 1
+          param1[1] = (slider.kvalue(e1.name .. 'param11') ~= (e1.params[1] and e1.params[1].default) and slider.kvalue(e1.name .. 'param11'))
+          param1[2] = (slider.kvalue(e1.name .. 'param12') ~= (e1.params[2] and e1.params[2].default) and slider.kvalue(e1.name .. 'param12'))
+          param2[1] = (slider.kvalue(e2.name .. 'param21') ~= (e2.params[1] and e2.params[1].default) and slider.kvalue(e2.name .. 'param11'))
+          param2[2] = (slider.kvalue(e2.name .. 'param22') ~= (e2.params[2] and e2.params[2].default) and slider.kvalue(e2.name .. 'param12'))
 
           local p1 = ''
-          for i,v in ipairs(param1) do
+          for i,v in ipairs(nillify(param1)) do
             p1 = p1 .. (i > 1 and (', ' .. v) or v)
           end
           local p2 = ''
-          for i,v in ipairs(param2) do
+          for i,v in ipairs(nillify(param2)) do
             p2 = p2 .. (i > 1 and (', ' .. v) or v)
           end
 
@@ -73,17 +81,17 @@ function self.createButtons()
           local e1 = ease.eases[dropdown.kselected('ease1')]
           local e2 = ease.eases[dropdown.kselected('ease2')]
 
-          param1[1] = slider.kvalue(e1.name .. 'param11') or (e1.params[1] and e1.params[1].default) or 1
-          param1[2] = slider.kvalue(e1.name .. 'param12') or (e1.params[2] and e1.params[2].default) or 1
-          param2[1] = slider.kvalue(e2.name .. 'param21') or (e2.params[1] and e2.params[1].default) or 1
-          param2[2] = slider.kvalue(e2.name .. 'param22') or (e2.params[2] and e2.params[2].default) or 1
+          param1[1] = (slider.kvalue(e1.name .. 'param11') ~= (e1.params[1] and e1.params[1].default) and slider.kvalue(e1.name .. 'param11'))
+          param1[2] = (slider.kvalue(e1.name .. 'param12') ~= (e1.params[2] and e1.params[2].default) and slider.kvalue(e1.name .. 'param12'))
+          param2[1] = (slider.kvalue(e2.name .. 'param21') ~= (e2.params[1] and e2.params[1].default) and slider.kvalue(e2.name .. 'param11'))
+          param2[2] = (slider.kvalue(e2.name .. 'param22') ~= (e2.params[2] and e2.params[2].default) and slider.kvalue(e2.name .. 'param12'))
 
           local p1 = ''
-          for i,v in ipairs(param1) do
+          for i,v in ipairs(nillify(param1)) do
             p1 = p1 .. (i > 1 and (', ' .. v) or v)
           end
           local p2 = ''
-          for i,v in ipairs(param2) do
+          for i,v in ipairs(nillify(param2)) do
             p2 = p2 .. (i > 1 and (', ' .. v) or v)
           end