I'm guessing you are trying to create the links on iOS? I noticed iOS has a hard time rendering longer lists with numbers; 1 & 2 have lots of permutations and only 5 or so show up and for some reason it rarely seems to be 1 or 1 versus 18, 12, etc. On MacOS you can see them in a longer list and I had no issues.
The workaround I used on iOS was to briefly change the 1 January note to 99 January (for instance) and link to it, then immediately rename it back to 1 January. Same with 2 January. And so on for the other months as you go.
Hope that helps.