1) Is this a new construction home? There contracts are often specific and may allow for them to continue to market the property until sold.
2) Are you represented by a Buyer's agent or not? If not, have you inquired to the listing agent yet?
I used to be licensed in Texas (though I am not currently and things may have changed), and when a contract was in various stages of pending, it would show status such as "active option", or "active pending" etc. Until a deal closes, other buyers can get into second position, so that if your deal doesn't close, they will be in a backup contract position.
This could also be due to a mistake/ oversight by the listing agent in which case a quick phone call or meial may address it being chnaged to the proper status.
Hope this helps!
Since yours is a new home in the process of being built, the sales office may be using your home's advertisement as an example of homes available. Or, it could be as mentioned above, they may wait until it gets a lot closer to closing before changing the status. For best peace of mind, call the sales office and ask them. My guess is that you do NOT need to be worried. ~Congratulations! Aloha~