Multiple agenda buffers

["Robert P. Goldman" <rpgoldman@sift.info>]

I find if I accidentally return over an item's date, I get a second
agenda buffer for that date.

That seems fine, but what I don't like is that from now on, any org
agenda commands go to THAT buffer, rather than going into the old agenda
buffer, which I keep around all the time.

So I have, for example *Org Agenda* and *Org Agenda(a:2014-03-25)

Is there some way to kill the latter so that it does not come back?

I did ^X-k in that buffer, and it disappeared, but my next org agenda
command went into a buffer like that, instead of going into the original
*Org Agenda* (and its frame).

Is this related to org-agenda-this-buffer-is-sticky?  I don't really
understand the description of stickiness in org-agenda.el and it's not
referenced in the index of the manual.

thanks,
r