Why do I pronounce "Atlanta" or "Atlantic" as "egglanta" or "egglantic."?

Background to determine any regional or generational dialect: -I am in my early 20s. -I live in the Bay Area, California USA. -I'm a native English speaker. -I was born in Southern Arizona and lived there until the age of 8. - I am middle class. College educated. -I am Chinese, White, and Hispanic... show more Background to determine any regional or generational dialect:
-I am in my early 20s.
-I live in the Bay Area, California USA.
-I'm a native English speaker.
-I was born in Southern Arizona and lived there until the age of 8.
- I am middle class. College educated.
-I am Chinese, White, and Hispanic American

I've always pronounced those words like this. Only recently have family members begun to clown me for it. Is this a part of a dialect or do I have a minor speech impediment?
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