[Dovecot] Pigeonhole Sieve IMAP flag question

Hello,

Here is a small script that I've been running to test a problem I've been seeing. Shouldn't this result in the mail being delivered to the inbox as a new message (ie. without the \Seen flag)?

 require "imap4flags";

 addflag "\\Seen";
 removeflag "\\Seen";

Every message gets delivered to the inbox as though it's already been read.

Using Dovecot 1.2.9 and Pigeonhole Sieve 0.1.14.