** keeps getting unescaped

I created a Wiki entry by pasting in this text.

You can make your phone ring longer than 15 seconds before it diverts.  Obviously this should be handy for when you're on call.

Type in the following

**004*number# (all diversions)
**61*number**delay# (not answered)

OR

**61*number**delay# (not answered)
**62*number# (unreachable)


**67*number# (busy)

For some reason, it interpreted the first series of ** in each paragraph as bold, but subsequent lines appeared as a literal **.

I went to the wiki markup page to correct this, and added a backslash before each * to ensure it wasn't interpreted as bold.

Annoyingly, after making another change to the page, my backslashes were forgotten and it went back to the first line of **s being bold.

I'm using Firefox 3.0 on Linux.