Why are my constraints not aligning on buttons?

I've read how to layout and constrain buttons and controls on developer.android.com, watched a couple videos, completed some tutorials. I still can't figure out why this happens?

Button1 constrainted to: bottom TextView, left parent, bottom parent, right parent
Button2 constrained to: bottom TextView, left Button1, bottom parent, right parent

on the Design and Blueprint:

TextView
Button1 > Button2

On the Emulator:

TextView
Button1
Button 2

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We'd need to see examples of what's happening and (hand-drawn) examples of what you want to happen.