I just bought a new offer pack and I was seeing 6 coupons for each restaurant, but suddenly I am only seeing 3 coupons. What happened?

The reason is that when you bought the new offer pack, your old pack was still valid so you were seeing 3 old coupons plus 3 new coupons. Now that your old offer pack has expired, the 3 old coupons have been removed from your account, and only the 3 fresh coupons are showing.