Endnote references are inconsistent and incorrect

Dear readers,

I have a problem with Endnote, it doesn’t create proper citations. I am trying to use APA format, which goes well for some references and not so well for others. For example, 

Correct: (Mak & Kusnadi, 2005) 

Incorrect: (Renee B. Adams & Funk, 2012) → Why does it show the first name as well here? That’s not correct, it should be (Adams & Funk, 2012). 

Also: sometimes it uses “et al” and sometimes it doesn’t, irrespective of number of authors. For example two papers that both have 3 authors: 

(Battaglia et al, 2014)

(Kini, Kracaw & Milan, 1995) 

Why is it inconsistent in this? 

Dear readers,

I have a problem with Endnote, it doesn’t create proper citations. I am trying to use APA format, which goes well for some references and not so well for others. I am using Endnote X8. 

For example,

Correct: (Mak & Kusnadi, 2005)

Incorrect: (Renee B. Adams & Funk, 2012) → Why does it show the first name as well here? That’s not correct, it should be (Adams & Funk, 2012).

Also: sometimes it uses “et al” and sometimes it doesn’t, irrespective of number of authors. For example two papers that both have 3 authors:

(Battaglia et al, 2014)

(Kini, Kracaw & Milan, 1995)

Why is it inconsistent in this?

Help will be appreciated. 

Dear readers,

I have a problem with Endnote, it doesn’t create proper citations. I am trying to use APA format, which goes well for some references and not so well for others. For example, 

Correct: (Mak & Kusnadi, 2005) 

Incorrect: (Renee B. Adams & Funk, 2012) → Why does it show the first name as well here? That’s not correct, it should be (Adams & Funk, 2012). 

Also: sometimes it uses “et al” and sometimes it doesn’t, irrespective of number of authors. For example two papers that both have 3 authors: 

(Battaglia et al, 2014)

(Kini, Kracaw & Milan, 1995) 

Why is it inconsistent in this? 

Help will be appreciated.