Automator Strangeness (is probably my fault)

[JohnnyB]

I'm new to Automator and poked around looking for some idea's...then pieced together this little script to make adding a quick signature line simple to any text box. But it's acting strangely so i'm wondering if I've written some poor code. Any advice is greatly appreciated.

tell application "System Events"
keystroke "Thank you,"
keystroke return
keystroke "John Borgen"
keystroke return
keystroke "Sr Backline Engineer - Salesforce.com"
end tell