aerender -b not incrementing properly

I am attempting to render every other frame with this command :

./aerender -project /Users/jakarta/Desktop/testAE/testAE.aep -mp -s 0 -e 15 -i 2 -comp "compTest"

It renders every other frame as seen in the log :

PROGRESS:  00000 (1): 0 Seconds

PROGRESS:  00002 (2): 0 Seconds

PROGRESS:  00004 (3): 0 Seconds

etc.

BUT it does not increment them properly. I would expect

test.0000.dpx

test.0002.dpx

test.0004.dpx

BUT it is incrementing as if it is advancing by single frames

test.0000.dpx

test.0001.dpx // Which is actually frame 2 of the comp

test.0002.dpx // Which is actually frame 4 of the comp

How do I render every other frame and increment correspond with the actually comp frame number?

Thank you