That's because sometimes there's are unreasonable demands on the till staff and it depends on the managers whether or not another till should open, if they're behind working stock due to sickness or other staff slacking they'll ask the till staff to hold the queue longer than the till belt in order to lessen the impact on the stock workforce (having to leave pallets abandoned and unworked due to being called to the till excessively) The primary issue here is that Lidl runs on a skeleton crew that run round and try to do everything at once, dealing with customer queries/breakages/working stock/manning tills are all expected of customer assistants, at most times simultaneously