.IF from .IF/.ELSEIF block combining the output from .IF *and* .ELSEIF when it should specifically move to .ENDIF [duplicate]

I am having trouble with the .IF/.ELSEIF block of my MASM code. The "Yes" response (click of the button) triggers both a "Yes" and a "No" message, while the "No" response (click of the button) triggers just a "No" message (as expected/correctly). Using dumpregs we know that a value of 6 in eax means a "Yes" was triggered and a value of 7 in the eax means a "No" was triggered. So I'm not sure why my code is failing to work. Any guidance would be appreciated.

INCLUDE Irvine32.inc

.data
    caption BYTE "Question?", 0
    question BYTE "Were there really 3 different types of humans living at the same time?",0dh,0ah,0
    yans BYTE "Correct! DNA convincingly shows 3 lineages: modern human, Neanderthal and Denisovan...and maybe 3 others."
    nans BYTE "Wrong! Google is my friend."

.code
main PROC
mov ebx, OFFSET caption
mov edx, OFFSET question

call MsgBoxAsk

.IF eax == 6
    mov edx, OFFSET yans
    call WriteString
.ELSEIF eax == 7
    mov edx, OFFSET nans
    call WriteString
.ENDIF

exit
main ENDP
END main

When I press "Yes" I get the following error:

Correct! DNA convincingly shows 3 lineages: modern human, Neanderthal and Denisovan...and maybe 3 others.Wrong! Google is my friend.
C:\irvine\Project32_VS2019\Debug\Project.exe (process 9828) exited with code 0.
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