auto correct - Delete certain mis-spelled words from Android dictionary (These words were not listed in the "Personal dictionary")

I have a Sony Ericsson Xperia mini (running Android 4.04). I'm trying to remove a few embarrassing words which show up during typing. I tried through Settings → Language and input → Personal dictionary. When I checked the Personal dictionary, I see that there are no such words listed, though there is an option to add new words to this list. I added a few words and then afterwards I could delete them also. But I couldn't find any way to delete those words which come up during typing messages etc.

I might previously have typed those wrong spellings accidentally, and I think through the Learn new words automatically when typed feature the words have been added to the main dictionary.

Is there any way to remove them from there? I don't want to turn off the auto-complete/suggestions feature completely.