Tropical cyclones organized enough to have a pressure of 990 mb do not have dual surface centers. What appears to be happening is some sw shear and dry air are slightly disrupting the core. If you look closely, it is almost like there is a supercell continuously firing on the west edge of the center, but the deep convection fades as it attempts to rotate around the east side. The apparent hole east/ne of the center is just a dry pocket where deep convection is lacking. There should not be anything more than slow intensification as long as the deep convection struggles to wrap around.
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