To explain
1 £
2 £
1 was entered as a UK pound symbol and is unedited. I now see e-umlaut for this
2 was entered the same but then edited back to a pound symbol again.
On going in to edit for a second time 1 is still e-umlaut (the same as I see when viewing the post) but 2 was changed by the software to ampersand-word "pound"-semicolon, which views on the post correctly as a pound sign.
Keef's two characters are showing as an e-umlaut and a hyphen respectively.
UK character set here too. Internet Explorer 6.0.