Or simply couldn’t afford to repair things in exactly the same style. If you click through to the article, she makes fun of a triple window where one of the panes has a lattice on it and the others do not; I suspect that was a matter of needing to replace broken windows and not being able to find matching replacements.
Many years ago I bought a flat in England which was part of a Victorian townhouse that had been badly subdivided. I did quite a bit of work on it, but there was little I could do on my budget to offset some of the structural mismatches, and I shudder to think how it would have fared on this blog.
In the US people tend to buy houses at (or beyond) the limit of what they can afford, and that almost surely means design mismatches as they repair and renovate with strict financial limits.