Price changes done on a local MLS are fed electronically to Realtor.com and other internet portals such as Trulia.I sometimes find that with Realtor.com price changes (and other changes) can take 24 to 48 hours to be posted.
With regard to calling the listing company, I would ask (1) did you speak directly with the listing agent? , , , , If you spoke to the listing agent, then it is certainly a Trulia glitch that I am sure would be appreciated if report. As an aside, consumers cannot feed info to Trulia.
and (2) did the person answering the phone check the local MLS. Often times, the person answering the phone is an unpaid agent who is unwilling to put forth much effort to answering the incoming calls. Without checking the MLS the person answer the phone has no way of knowing of any price changes.
I would certainly follow Dunes recommendation and find a local buyers agent, that will pay attn to price changes and not only have these changes sent to you electronically, but if you make them aware of an interest in a particular property, they may very well give you a personall call the minute they see a change in price (as I often do with my buyers).
Francesca Patrizio, Realtor, ePro, SRES
Coldwell Banker Residential Brokerage