In the taxonbase, as it is now you do not necessarily get the current search result in your download when choosing "Download CSV". You need not only to refresh the search (with the "circular arrow"), but also to reload the page to get the search results into the CSV download.
To reproduce:
Search for "basidiomycota" then download
then search for "ascomycota", then download (gives you basidiomycota again)
In the taxonbase, as it is now you do not necessarily get the current search result in your download when choosing "Download CSV". You need not only to refresh the search (with the "circular arrow"), but also to reload the page to get the search results into the CSV download. To reproduce: Search for "basidiomycota" then download then search for "ascomycota", then download (gives you basidiomycota again)