tsgnash

This is a new problem. BBO messages remembers every message I have ever typed I think. I start to send a message to someone on chat page and I type "t" for example and every message I have sent starting with "t" pops up for me to select. Driving me crazy. I asked BBO and they told me to delete all of my autofill which I regretfully did on Chrome... STILL does it on BBO. Suggestions?