Celebrations Pouch 370g / Quality Street Pouch 382g / Heroes or Roses Pouch 357g - £2.25 (Instore Only / My Morrisons Members) @ Morrisons

They also have 15% off sweets as an offer on card that works with the £2.25 making it about £1.70 a pouch

Hmm. I wouldn’t rely on these being discounted / discounted properly at the till.
A couple of weeks ago, I had two such offers. One for 200g Pringles @£1.35 instead of £1.65 a tub (max 12 per customer) and the other for 20% off Christmas lights and decorations.
I bought 6 tubs of the Pringles to lay aside for Christmas and one new fancy bauble for the tree.
When I got home, I discovered that the bauble had not been discounted at all and the Pringles had not been discounted by 30p per tub but only 26p. Not that 6 x 4p is a huge amount for me personally to be done  out of but it’s the principle of the thing and it’s not the first time Morrisons deals have either not gone through correctly or not gone through at all. 
Any discount on such offers and the coupons in your app are all labelled as “My Morrisons savings” so unless you can be bothered getting the calculator out and working it all out, you don’t have a clue which discount is which seeing as you can’t see used coupons in the app once they are spent unlike at Lidl where your receipt in app shows what was used. 
I basically just don’t trust Morrisons any more. If these sneaky tactics apply to every loyalty card shopper they are clawing back a huge amount of the already paltry discounts they now offer.

Fab price thank you so much! Popped in this morning to get them for Christmas gifts, it combined the offer with the 15% off chocolates on My Morrisons card, making it £13.80 for 8 pouches!

Erm? :/ £2.25 - 15% = £1.70 ….. I don’t think so ??