Rather than delete a sprite and then add a new one just Replace the old sprite with your new one. Make sure you select the Replace Current Angle function otherwise it will replace the sprites for all angles.
Depending upon how you drew the sprite (i.e. size, dpi, etc.) how it is brought into CTA. You will need to resize and reposition any sprite that you import into CTA using the Sprite editor (i.e. blue box around the sprite).
After all your sprites have been imported, sized, and positioned, you need to run the "Confirm multi-angle Settings" function.
Jeff
Get my Plugin Manager and TaskNotes plugins for iClone.
Check out EZColors and Other products for CTA/CA. EZColors: the easy way to change Render Styled (RS) colors!
See my CTA Tutorials on the YouTube channel CTAStepByStep