Many people are having this problem that when you send a message, then your friend sends a message, then you send a message, your message will be put in the same box as the one you sent before your friend sent one.
The reason for this is because of Windows’ time server is off by about 20 seconds.
Here is the fix!
From the Desktop, click or tap on the date and time in the Windows Notification Area in the bottom right corner of the screen.
In the the window that pops up click Change date and time settings
Another window will popup click the Internet Time tab
Click the button that says Change settings…
In the drop down menu select something other than time.windows.com and then click Update now
That’s it! Enjoy having your sanity back.