Import into an existing taxonomy vocabulary using find and replace.

First up, awesome module. Ridiculously useful!

Secondly, I'm not sure if this is a bug or if I'm just not doing something correctly, so I've filed this as a support request to start.

I've got a csv file with column that contain either a zero or a one in them per column per row.
e.g.
educational | government | recreational
1 | 0 | 1

I have a taxonomy vocab with a term for each of the column headings as well.
in the feeds mapper, I've mapped the each column heading in the csv to the taxo vocab.

Then I created a find and replace plugin for each column that changes the 1 to the taxonomy term in the vocab. (So for the educational column, find the number 1 and change it to educational) My logic being that for each number 1 in the row, it would add the corresponding taxo term to the node.

However, what it does is only insert the last taxonomy term it finds, not a term for each one. so in the example above, instead of adding educational and recreational to the node, it only adds recreational.

Am I going about this wrong? Is there a better way to do this?
Any help or direction would be much appreciated!

~Row