PeripheralsPlusOne Interactive Sorter bug

--[[
  Interactive sorter dupe/item overwriting bug

  Modpack FTB Ultimate Reloaded 1.6.0
  Forge: 14.23.5.2836
  cc-tweaked-1.12.2-1.82.2
  PeripheralsPlusOne-1.12.2-1.1-build-T58
 ]]

-- sorter settings
local sorterSide = "right"
local pullSide = "up"
local pushSide = "east"
local sorter = peripheral.wrap(sorterSide)

function getNextItem()
  local item = nil
  --pull slot undefined
  local hasItem = sorter.pull(pullSide, 64)
  if(hasItem) then
    item = sorter.analyze()
  end
  return hasItem, item
end

function logMinedItems()
  local itemMap = {}

  repeat
    local hasItem, item = getNextItem()
    if(hasItem) then
      itemMap[item.name] = item.amount + (itemMap[item.name] or 0)
      sorter.push(pushSide, 64)
    end
    sleep(0.5)
  until (not hasItem)

  print("Total mined")

  for k,v in pairs(itemMap) do
    print(k .. ": ", v)
  end

  return itemMap
end

logMinedItems()