I experienced about the same, had access to 12 cylinders and then lost it again.
But I thought it had to do with the new code that merges skill points when you take over other company's (which I did).
"-Design skill points now increase or decrease if you buy/merge/or spin off a company."
Maybe OP has taken over or merged with other company's in that time frame that makes it look like his skill points do not go up?
But I thought it had to do with the new code that merges skill points when you take over other company's (which I did).
"-Design skill points now increase or decrease if you buy/merge/or spin off a company."
Maybe OP has taken over or merged with other company's in that time frame that makes it look like his skill points do not go up?