Haven't we had some fun and games with this one! And such a lovely plant. Personally feel they are all Tissue Culture plants so consequently tend to be a bit more temperamental in the early stages.
Also believe there are weaker and stronger clones in TC, seed grown plants and offsets. Add the water shy nature of all agavoides during summer, everyone's different growing conditions and experience and we have a plant viewed by many as the "Problem Child"...even from seed.
Different clones seem to vary in their colour. Not sure yet if that's just growing condition related or not.