If it's received instantly, Steve could be referring to the guy/gal who handles payments and that he or she hasn't had a chance to confirm your payment yet.
Please keep in mind that "Steve" is only a pseudonym/nick for one or more persons and that TDs handle many orders per day, not only 2 or 3 per month. So patience is very important, not only in general, but with replica dealers in particular. Lots of delays are actually quite normal.
For example, I ordered a rubber strap a month ago with Theonewatches and VSF is simply not delivering it. So I have to wait and be patient. But I'm not nervous... Because our money is 100% safe with our TDs. That's why they are TDs.