Can't say for Lidl, but certainly my local Tesco tends to have overstock if there's an offer on, if a line is new and they don't know how much to order, or when they're moving stuff around to put in festive / seasonal lines.
I pick up in-date ham and bacon regularly as a result, and for some reason lately, eggs, on sticker.
I'd wager stocking levels is some weird combo of software, store manager and diktats from head office.
