I'm sorry that I didn't find and answer your question sooner. In the future, if you have questions about Trulia, please post your question in our Using Trulia category.
It looks like you've submitted many of your listings to us manually in which case the photos will display in the order in which you uploaded them. Those listings that you didn't submit to us manually are coming from Keller Williams and we display those listing photos in the same order in which they are included in the data feed they provide to us. In that case, you'll want to ensure that they are including those photos in the order you want.
Also, I noticed that the links for some of the listings you manually uploaded to us aren't working correctly. The listing below is an example. I encourage you to check the listing and make sure that you've provided us with the correct URL. If you need any assistance correcting this, or if you have any further questions about your listing photos, please let us know.