Yes, it means that Romney has been deceptive about his involvement in Bain following 1999. I assume that you were relying on Romney's deception when you stated that "Bain got involved with Stericycle after Romney left to go handle the Olympics." I am not suggesting that you were the source of that deception. For some reason, you apparently believed that you could rely upon Romney to tell the truth about this matter. You should know better now.
it still doesn't show when Stericycle became involved in this line of "business," that Romney knew about that line of business, etc.
Well, I'm going to assume that Romney knew just about all there was to know about any companies he purchased an interest in. If Romney chooses to claim that he didn't know what he was doing when he bought and sold companies, then we'll just have to evaluate that kind of statement if and when he makes it. In the meantime, I think it's fair for me to assume that he thoroughly investigated the companies he bought.
If and when Romney or Stericycle claims that Stericycle waited until Romney sold his interest in Stericyle before trafficking in the bodies of little boys and girls murdered in abortion mills, then we can evaluate that kind of claim if and when it is made, bearing in mind that Romney can no longer be relied upon to provide truthful information about this matter.