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Welcome Roy
Looking at the out of focus image you posted it does seem that there is a slight flare to the left side of the star donut and the dark shadow of the secondary is ever so slightly off centre. Does the slight flare change sides when you move the focuser past the focal point to either inside or outside of focus. I'm not familiar with RC scopes and their colimation but would not be dissimilar to newtonian collimation. I'm sure that there are several owners of GSO RC scopes on the forum that may advise of the techniques required but I wouldn't worry about the collimation for now.
Learn how to use the scope and camera before fussing over fine details like possibly slightly out of round stars in your images. Enjoy the learning process.
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