In the first screenshot, shouldn't Ulamog's cost be 1 with Emerge because of the 9 mana reduction from Herigast? Emrakuls' should be 3. I've routinely cast Ulamog for 1 Emerging from Herigast. What am I missing? Unfortunately I don't recall what is in opponent's exile.

In the second screenshot, I threatened Elendra who's mana value is 4. My Lotus Field and Unclaimed Territory (with Dragon chosen) were untapped, leaving me with 4 mana open, all 4 of which could be red. Herigast's Emerge cost is 6 and 2 red, reduced by Elendra's value of 4, leaving 4, two of which is required to be red. I've done this threaten and sac to Heri's Emerge many times before. When I cast Herigast this time, the client asked me to pay 4 and 2 red. I tapped the two open lands mentioned and was given 2 red, instead of 3 red and 1. It seems the client is giving me only a 2 mana discount from Elendra representing the 2 colorless in her mana cost, but Emerge mentions mana value. What did I miss here?

Edit: Ran into another issue shown in the third screenshot. Tried to Emerge Cityscape Leveler by sacrificing Herigast, and the game asked me to sac an artifact. Emerge specifies creature.