I have both the Everyday Extra subscription and the mobile plan which both carry the 10% off one shop.
I think that my EE promo got used instead of my mobile one when I shopped today. The mobile one you can only redeem in store but the EE one you can redeem either in store or online. I would have obv preferred the mobile one to be used at checkout since I also do shops online, but I just got a prompt of "do you want to use your 10% now?" and I clicked yes.
Is there a way to pick which one of the two you use? I'm pretty sure both EE and my the mobile plan are linked to my everyday rewards card. I only got the new extra sub cause it was half price for black friday and so didn't really run into this problem before.
I also have access to both but don't make online orders - when I redeemed last night it definitely didn't ask me which offer I wanted to use.