In the Spotfire analyst if you used a details visualization and use ctrl + a on your keyboard to select all of the data, instead of selecting all of the visible data it selects all of the data that is stored in the underlying table. Yet still only displays the rows that were visible as marked. This is incredibly misleading and confusing for the end users.
I also find this misleading, but more in the case of a data limiting expression. However, CTRL-A exactly does what it says: Mark filtered rows.
I think this idea can be merged with TS-I-7052