"Gutierrez said in the interview that Savvas Savopoulos had asked her to help at the studio on Tuesday, Wednesday and Friday, instead of at the couples home on Thursday."
http://www.washingtonpost.com/local...140154-fbf7-11e4-9030-b4732caefe81_story.html
I'm getting a better picture now of how crazy these messages are.
The housekeeper normally worked at the home on Thursdays, but the week of the murder, she was hired to work at the martial arts studio INSTEAD of working at the home on Thursday. She never intended to be at the home on Thursday so all the messages to keep her away were unnecessary.
She was with SS at the studio on Wednesday and he told her Amy had plans to go out that night (reference the link above - it's in the article). Then, she receives a voicemail that night from SS telling her the family is sick and not to come on Thursday, which she found tense and strange.
And he asked her to call the other housekeeper's husband because she was staying overnight. Can you imagine getting a call from your spouse's co-worker to tell you your spouse is staying overnight at the employer's home which has never happened before?! That's weird.
On Thursday, she received the blunt text from Amy's phone, which she also found strange.
The messages are indeed strange!