The price in the info record (EINE-NETPR) does not always agree with the price that is taken from the info record when creating a purchase order. The most common cause is that the condition was updated by condition maintenance. This will not translate into a direct update of the net price in ME13 (display info record). If you want the net price to show exactly as the info record condition, then schedule report/program RM06INP0 (SM36). This will do an update routine and synchronize prices.