How do I stop my phone from sending the wrong account information?

[AC Question]

The other day, I emailed a photo from my phone to my office but it showed up in my Inbox as coming from my wife's gmail account. I ran through all of my settings but no where on my phone is her account being sync'd.
Somewhat similarly, my wife sent a text to a friend but the message showed up as if from me/my phone instead of her's. No where on her phone is she syncing with my account.

How do I fix this?

 

[B. Diddy]

Welcome to Android Central! Which email provider are you using, and which email app (the stock Email app, or the Gmail app)?

Was your wife using the stock messaging app to send an SMS, or was it some other kind of IM app like Hangouts?

 

[Nytewalk]

Now registered.

Email provider = Gmail
Email App = Gmail (from Google Play)
Messaging App = stock
Both Phones = HTC One (M7)

 

[B. Diddy]

That's strange. You and your wife have completely separate Google accounts, right? It isn't one overall Google account with two different associated email addresses, correct? This must be the case, but just want to make sure.

Are you both on the same carrier? It'd be worth asking the carrier how the texting confusion can happen, although who knows if they'll have any kind of answer ...

 

[Nytewalk]

Yes, two completely separate Gmail accounts. They are not associated or connected in any way.
We are with Sprint and their Customer Support said their is no problem with the signal or our ability to send and receive calls. The tech I spoke to surmised the problem must be with the android software as it was obviously not an HTC hardware malfunction which could be readily ruled out. She questioned whether the email accounts had become linked also, but said that wouldn't apply to text messaging; and therefore, must be an android problem.

 

[B. Diddy]

Danged if I know. Just to be sure, open Gmail on your computer browser, click the gear at the upper right and click Settings, then Accounts and Import. Under "Send Mail As," you only have your email addresses listed, correct?

 

[Nytewalk]

Yes, that is correct. Checked both accounts.

 

[B. Diddy]

I officially have no idea now. Let me ping some of my colleagues to see if they might know.

 

[Rukbat]

Call your wife's phone with your phone. Who's number shows on her phone?

Do the same thing in reverse. Who's number shows on your phone? (Texting and voice follow the same paths, so if it happens with voice too, it's Sprint.)

As for the email crossing, if it's possible, remove both accounts (one from each phone), power off, power on and add the accounts again.

If it still happens, see if you can get Google to close both accounts (if that's a possibility for you - some people need to keep all their old emails on their current accounts) and create them again, one at a time, and add them to the respective phone as you create them. That way, your phone can't be sending from her account, because her account doesn't exist yet.

(This is why systems analysts are bald by the age of 30 - it's one of those "this isn't possible" problems - until someone figures out why it happens. Then it's "of course - how stupid of me to not have thought of that".)