Why do letters keep skipping my "jump if zero" command?

Why do letters keep skipping my "jump if zero" command? - Free stock photo of alphabet, be a self starter, blur

I'm on Zero Preservation Initiative (Lv. 9) and can't seem to get past this area. For some reason letter blocks get past my "jump if zero command" and go to the outbox causing a failure.

Video showing it:

What am I doing wrong here?






Pictures about "Why do letters keep skipping my "jump if zero" command?"

Why do letters keep skipping my "jump if zero" command? - Brown Wooden Blocks on White Table
Why do letters keep skipping my "jump if zero" command? - Brown Wooden Blocks With Numbers
Why do letters keep skipping my "jump if zero" command? - Brown Wooden Scrabble Tiles





Linux x64 Assembly Tutorial 7: Jump and Branch Instructions




Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Brett Jordan, Brett Jordan, Brett Jordan, Brett Jordan