How Did
this get such a high rating?
'Then' and 'than' are completely different words and have completely different meanings.
I don't have an answer for your question, but I love your signature. It's a pet hate of mine also. And I hate the misuse of the words of and off.
shareLets make a list.
Their, They're, There
Were, We're Where,
Two, To, Too
By, Buy, Bye
There's more but that's all I can think of at the moment.