Go to market and dl "SMS Popup" app. No problems with misdirected text messages using this app. There are other similar apps out there as well. But this one I especially like because it puts a temporary popup over the lock screen with the options to close, reply or delete right there. Also is customizable as to alert sound and color LED for specific contacts.
Unfortunately, when most people get a "new" replacement phone, it's most likely a refurbished one ... something someone already turned in and it was probably just wiped (Factory Data Reset) back to "out of box" operating system. It's hard to get another genuinely new replacement.