Tradesatoshi is not very intuitive at all..but its functional eventually. I had some problems with it too until i learned how it works.
As a short tutorial, once you are on the VOT trading page, you check the available SELL orders (if you want to BUY), or the available BUY orders if you want to sell, then put your price equal to the first offer that has the amount of coins you want, or just the first buy/sell offer. When you click the offers, the numbers change in your BUY/SELL sections above, be sure you change the amount you want to buy or sell before submiting.
If there are not enough offers to cover the number of coins you want to buy/sell at the price you desire, you can wait untill the market fluctuates and the price reaches your desired price, or you can change the price to match the next avaiable offer.
If you are not used to exchanges or have little experience with trading i suggest you be very careful at the totals, or do just a test till you get used to it first. This exchange works in fact very similar with other exchanges, but somehow the interface is confusing many times because of the way and the order you need to click things and the way those fields get auto-filled with data..a nightmare..but eventually works.
For me, a VOT withdrawal yesterday worked in about 30min and a ZEC deposit in about 2 hours