Sell order not being filled

Hi, I took a little position on a stock and thought I would try and sell it a day later, as it had gone up quite a bit. So the funds for the purchase had not yet been taken out of my CBA trading account. Is this why the sale didn't go through, even tho the stock had reached my sell price? I notice another share I have a sell order in for, is still showing in my portfolio, with "zero" in the number of units column, which is fine, it is in the market. but the newly purchased shares are not showing at all. The sell order is still listed in my current orders area for both shares, if that makes sense. My question is..why hasn't my sell order been processed, if it has reached the sell price? Thanks for any ideas.