Gemini is creative and stuff but lacks the completion part that Sagittarius brings up!

Even though I'm not Gemini but Cancer, with Cancer ascendant I can feel the influence in my chart of Gemini from my Moon and Venus in Virgo placed in third house... Sometimes I wonder if my mom got the time of birth wrong because I feel pretty much Gemini, personality wise... 30 mins earlier my ascendant would make sense... How do you explain that?