I have an iPhone. My partner used to have and we shared a computer to update and all that stuff.
Been together 5 years, have two children together and he has an older son that lives with us 50/50.
I was just listening to my recordings of our little boy when he was tiny cooing and trying to talk. Then I stumble across 3 recordings of my partners whispering that must have merged with mine from the computer. For example:
"It's September 23rd. She's trying to say SS broke the baby gate just because he was upstairs near it at the time. I have photo evidence, repeat photo evidence of the break. She's saying it was him. Again, September 23rd"
And a couple more like that 
What in the hell?! Am I being unreasonable to think that's not normal behaviour