Boots Chester - Johnson's baby products - buy 3 for FREE (possible glitch)

Found this post recently

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Boots Parenting Club currently offering £3 off when purchasing 3 baby bath or skin products. Johnsons 500ml bottles are currently also BOGOF in store. Purchased:

Johnsons Baby Top to Toe 500ml £2.99

Johnsons Baby Bath 500ml £2.29 (free on BOGOF)

Johnsons Baby Powder 500g £2.29 (third item to get £3 off)

so total should have been £5.28 (£2.99+£2.29) - £3 voucher = £2.28 at checkout; however all scanned through at £-0.72 so was given 72p gift card to make up the difference

Not sure if this is just a glitch at the tills but happy shopping!

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Personally i think BOTH the electronic version of the £3 off 3 baby products on the boots app ("my offers") and the posted-out paper version (save coupon) activated together when all 3 products were bought, so saved the £3 twice! £5.28 - £6 = 72p credit!

So i believe to get this deal you actually require an ignorant person operating the checkout