Weren't prices supposed to be falling this year? So far, they're increasing. The latest February numbers from DataQuick show that the median price of all homes sold in L.A. County was $528,000, up 7.8 percent from a year earlier. Sales, meanwhile, fell 11 percent - the slowest February since 1997. But that percentage drop is an improvement over the 20 percent-plus monthly declines seen throughout much of 2006. Anyway, keep in mind that February is always a slow month, so the numbers might not reflect what will happen in the spring, when the market typically picks up. LAT