I have to agree with theducks. Never saw Sigil create a style that was not called sgc-*. Are you sure there wasn't a style in Word that was called 'IGotHired'? That would explain it.
Also I never have issues with saving with Sigil 0.6. The only times a save cannot work, is because there is a problem with the code. That is of course a very valid reason not to save.
I wonder what the circumstances are with regarding the save issues.