Thank you so much for all your help and for updating everything!
Sorry I must not have caught the “s” in the different files
*Also as a side note, in case anyone else does this, for a while I kept trying “feature-table filter-samples” instead of the “filter-feature” against the accessions file so obviously it was just filtering out every sample…
Once I tried the new 2019 versions and replaced the accessions file spaces with underscores, it all worked!