Storage/Memory Problem Razr2 V9

Question

I can only store about 30 text messages on my Razr2 V9. Is this normal? I have had cheap phones that will store almost 100 messages. I recently took my SIM card out temporarily and put it in another phone. When I switched back, I had lost most of my text messages. Ironically, it didn't delete the oldest ones first. I also had the phone set up to save text messages to memory card. Are my messages lost for good? Thanks, Tina