Lets be clear that CAL isn't saying anything (I don't think she would appreciate the inference), she has just reported what others have said so who do you have in mind when you mention 'different opinions'?
Ok, different people's comments about Sheila on the Monday and Tuesday before the murders (CAL's book, pp587-632)
Monday : Douglas Pike called to collect a faulty telephone. Was greeted by Sheila. Also saw the twins, and thought "what a happy family they seemed".
Jean Bouttell, the housekeeper thought Sheila "seemed her normal self, if a little quiet"
Stuart Sinclair thought "nothing amiss"
Philip Wilson thought Sheila "appeared quite happy"
Sheila's cousin, Yvonne, thought the same, when Sheila telephoned her for a chat.
Tuesday:
Len Foakes thought Sheila seemed "very happy"
Michael Horsnell, decorator, thought Sheila was "like a zombie", and that she walked very rigidly.
Barbara Wilson thought it unusual to see Sheila and Jeremy together, but didn't say there was anything out of the ordinary about Sheila's demeanour or behaviour.
Barry Parker, shop owner, described Sheila as "vague and distant" and thought she was strange, when she visited his shop with June and the twins. He commented about her lipstick being all over her teeth.
Elizabeth Smith, a friend of June's, who knew Sheila, did not comment on anything being unusual when June and Sheila visited her.