IllinoisPlumber, this is not right and it's not normal. The resistance can change a bit (0.01-0.02 Ohm) with tight connections and solid build, after some days, but no way to have such big difference. Something is wrong with your connections somewhere, check your 510 connector on the mod and your atomizer, coil, mounting posts, 510 pin, every possible contact. Also checking your build in Steam Engine, the correct resistance looks to be the .28, so probably you had a short somewhere in the coils and it was showing way lower resistance. Always use the steam engine calculator when building new coils, especially dual coils, and check if the resistance of your new coil matches the calculator result, before wicking and firing.