user.setNull for lastCron right away, to avoid missing lastCrons

src/app/index.coffee

@@ -102,7 +102,7 @@ cron = (model) ->
 
   # This is an expensive function, only call it on cron
   lastCron = user.get('lastCron')
-  return unless !lastCron or (helpers.daysBetween(new Date(), lastCron) > 0)
+  return unless helpers.daysBetween(+new Date, lastCron) > 0
 
   userObj = user.get()
 
@@ -118,6 +118,7 @@ cron = (model) ->
 
 ready (model) ->
   user = model.at('_user')
+  user.setNull 'lastCron', +new Date #set cron immediately
 
   # Setup model in scoring functions
   scoring.setModel(model)
@@ -236,7 +237,7 @@ ready (model) ->
     
     matrix = [['Date', 'Score']]
     for obj in model.get(historyPath)
-      date = new Date(obj.date)
+      date = +new Date(obj.date)
       readableDate = moment(date).format('MM/DD')
       matrix.push [ readableDate, obj.value ]
     data = google.visualization.arrayToDataTable matrix

src/app/scoring.coffee

@@ -144,7 +144,7 @@ score = (taskId, direction, times, update) ->
       adjustvalue = if (taskObj.up==false or taskObj.down==false) then false else true
       calculateDelta(adjustvalue)
       # Add habit value to habit-history (if different)
-      historyEntry = { date: new Date(), value: value } if taskObj.value != value
+      historyEntry = { date: +new Date(), value: value } if taskObj.value != value
       if (delta > 0) then addPoints() else subtractPoints()
       model.push "_user.#{taskPath}.history", historyEntry
 
@@ -181,7 +181,6 @@ score = (taskId, direction, times, update) ->
 ###
 cron = (userObj) ->
   today = +new Date
-  userObj.lastCron ?= today
   daysPassed = helpers.daysBetween(today, userObj.lastCron)
   if daysPassed > 0
     # Tally each task