In creating a new Lightroom export preset I first go to File Naming and under Custom Settings drag down to Edit. This opens up the Filename Template Editor. In there I add various things I want to see. I add the Sequence number and choose a style for the sequence number. Then I add all this as a new export preset. Before exporting I put in a Start Number for the sequencing.
When applying this preset to export future images the number will not increment. It just stays on the original Start Number.
I’m thinking that I may have a bad copy of Lightroom, but can’t figure out how to download another copy from my subscription