...frustrating...
Based on your post, I went ahead and added up my total credits. They are two short.
Then I decided to redeem my first flight. After the 16 point voucher redemption, it showed a balance of two points less than I should have (ie as if 18 were taken for the voucher), so now I'm 4 short.
Then I refreshed and two of the missing four came back. Very weird. And rather ridiculous that their website cannot do simple addition!
Still trying to figure out the web bonus and Amex Bonus. I do not have the Amex Card to which you refer - mine is a Costco Amex (for the 2% cash back on my weekly travel ^ ). Still got the point. Let us know if you figure it out.