I had an auction end on Friday evening and the winning bidder paid on Saturday afternoon just after 2pm. I have my dispatch time set at 1 working day. The buyer selected eBay delivery - Evri, yodel & DPD (2-3 days) at checkout.

Why was the estimated delivery date to the buyer showing as Monday-Tuesday? That was impossible for me to achieve without upgrading to express 1 day delivery at which I shouldn't need to do and the buyer didn't ask for it. Please can you help me to understand why this is happening? It isn't all sales, often the EDD is pessimistic but this one had me scratching my head. I wondered if the auction ending Friday glitched the algorithm or if my mistake was paying for the postage label on eBay later on the Saturday rather than waiting until Monday when the next courier collection was. I am not trying to be clever here, I just don't understand how this can happen. It puts my seller performance at risk if I get a late strike and gives a buyer unrealistic expectations. 

If I get a late delivery strike on my seller performance will I be able to appeal it?

The item number was 314523891790. 

Thanks