Most of the items on the right are NOT included.  On the right is more of a promotions/advertising area promoting products from DAZ in general.  They are promoting the David Figure and he can easily appear both under the PC Bonus items and on the right.

Yes, you DO get 25 items as both coupons are valid.  However I would do two separate purchases, one of 10 and one of 15, and apply the appropriate coupon to each purchase.  By the talk in the forums there has been the odd glitch and it can take a few days (since this is a long weekend!) to sort it out.

Brett