Credit card number not diplayed, CC validation not working..


My new cart 2.0.4 had few orders since last week. We process orders offline and I have no problem. Suddenly I have received 5 orders and I can not see their credit card info, cvv and exp date. It just looked like (xxxx xxxx xxxx 4356) and other fields like xx) when you delete the processed credit card info. What would be the cause for it?

Then, I made a dummy order with dummy number 12345678901234 it approved. Later I tried entering only 4 digits and it approved. I had a secured (SSL) and while entering I can clearly see the browser window shows https.

Any advice???