         complete = session.get('state').complete ? false
         playtime += session.get('playtime') ? 0
         lastPlayed = level
-        lastPlayedNumber = index + 1
+        lastPlayedNumber = @getLevelNumber(level.get('original'), index + 1)
         if complete
           currentIndex = index
         else

    levelsTotal = 0
    levelsLeft = 0
    lastPlayed = null
    playtime = 0
    levels = []
    for level, index in courseLevels.models

    nextLevel = courseLevels.models[nextIndex]
    nextLevel ?= _.find courseLevels.models, (level) -> not levelSessionMap[level.get('original')]?.get('state')?.complete

    stats =
      levels:
        size: levelsTotal
