In the LDS dict. Apostle is signed with an "A" bounced on the palm held vertically. Then Articles is "A" bounced on the palm held horizontally. Then on the LDS video dict. Apostle is signed "Follow - Agent" and Articles is signed the same way that Apostle is in the book. I'm so confused???

Yup, the magic of (now) twenty-six year old sign language dictionaries...

I'm not sure of the context you're viewing/trying to determine ARTICLES; I'm assuming you mean 'Articles of Faith'? I can't think of any other reason to sign ARTICLE in church other than "Did you read that article in the Ensign?" or "There's a very sweet article in the Friend magazine this month," and that is a different sign anyway.

Pronunciations of church signs APOSTLE and ARTICLES-OF-FAITH:

APOSTLE

ARTICLES-OF-FAITH

Members of our ward use these signs when they mean:
- "The latter-day church has apostles, just as in ancient times." (LONG-AGO CHURCH HAVE 12 APOSTLE? TODAY CHURCH HAVE 12 APOSTLE? SAME-AS)
- "Primary children memorize the Articles of Faith." (ARTICLES-OF-FAITH CL:5"list"? CHILDREN IXthere PRIMARY MEMORIZE+)