I did the same thing to #11 and ended up collecting #12 as a result. I hadn't intended to but saved me having to go out and collect 26 & 8 although I could have got 23 and dropped 5 & 3. I think that would have been longer.
By the time I realised I was on the road to 12, it was about 50/50 as to which was closest. I didn't want to get them both because it would have stymied the rest of my route.