Yes, you can edit your post, but only an admin/mod can delete it.
No worries, though - you guys are so well-behaved and self-run this place so smoothly, we have very little to do, so a little work to justify our existance, every now and then, is always welcome.
If you need a post deleted, just email/PM me and I'll get right on it.
If it's something really embarrassing that you feel needs removing urgently, just edit the post, blank out the text and leave a message along the lines Virginia has ably covered until I get there.
Oh, and I've deleted your double post in that thread.
LabRat