I am very new to android, and I am trying to send user-inputted data (their names) to another activity. I have in the past been able to send single lines between activities
An Intent is like a Map where you can store String (and other serializable objects) with a key. In your code you are using the same key EXTRA_MESSAGE twice.
Also, keep in mind that you use one Intent to start one Activity: you CANNOT have 2 Intent starting a single instance of an Activity. The solution is to put the 2 values with 2 distinct keys in one Intent.