According to the feeds, Lisa and Josh had an air-clearing talk. Further, she is probably trying to gauge just how much support Josh has. Instead of committing herself irrevocably, she decided to hedge her options and go with the original plan to nominate Lori and Marcellus. This was probably the correct thing to do.
"Pappy didn't get voted off, he got stoned!" -- dabo*** Contradictions don't exist. If you are faced with a contradiction, check your premises. You will find that one of them is wrong. -- Ayn Rand, Atlas Shrugged