The same thing happens with the company I'm affiliated with; however, I can go into my company's web site and manually change the photos. Once I have taken that step, the new photos feed into the other 125 Real Estate web sites my company sends data to . You may want to ask your Realtor if they need to take an additional step like this, for the new photos to appear on Trulia.
Patti Butler, REALTOR
Keller Williams Realty Signature Partners, LLC