Hi,
The problem comes from javascript execution.
Chosen was initialized before hikashopVote so, the chosen dropdown was displayed.
I made a patch which would delete chosen dropdowns is there.
So the bug is fixed (and would be included in the next zip file).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.