Ignore it man, you're doing fine. You got yourself quality batteries. You checked your amp draw. The voltage figure you had was incorrect, but that's been resolved now, and since you were using a higher voltage figure you were actually giving yourself more safe headroom anyway. Reading a number wrong is a mistake anyone can make, it doesn't mean someone can't build properly.
Your Sonys are rated for 30 amps
continuous draw which means holding the button down, and not releasing it until the battery is discharged to it's lower safe voltage. They are rated even higher for pulsed draw, which is what we do when firing our pv for 5 seconds or whatever. As a precaution it's seen as good form to stay within the continuous rating even though the load we place on the batteries isn't.
A .25 ohm build with a fresh battery is going to pull just under 17 amps, which is well within the continuous 30a rating. Assuming your batteries are authentic, your build is very safe to use with your batteries.
As for the safety of the build itself, you need to make sure you build is top-notch when hitting such high power levels. If you are running a dual coil that means each coil is a .5 ohm coil. Not really that unusual or extreme for a single coil, but definitely on the lower end of what most people do. I'd personally suggest sticking with 26g wire and make sure to have a good sized diameter so you have a lot of juice available.
Make sure to pay close attention to your wicking, immediately after a hit check your coil and see how dry it is. Coils at that high of power levels boil off juice REALLY quick, so if your wick isn't keeping up you're going to run into dry/burnt hits.
As long as your wicks don't dry out, and your current draw is within what the cell is rated for, you really don't have anything to worry about and can experiment to your heart's content