Technically yes, you can be separated for patterns of misconduct (Chapter 14-12b). If the violations are as minor as you state, the odds are slight that a chapter would be granted. However, the fact that the commander has indicated the possibility of a chapter action should raise a red flag to you. He may be giving you a verbal warning order to shape up hoping this will be enough to get you squared away. I advise you take his warning seriously.
Time to shape up
I encourage you to be the best Soldier you can possibly be and perhaps request a meeting with the 1SG/CDR on open door policy and get a verbal understanding of their expectations of you. Odds are their expectations will be to perform to Army Standard. As long as you are complying with Army Standard you have nothing to worry about. With that stated remember attitude and tone are everything. Be professional, calm, unemotional, and factual. No one can do anything to you unless you provide them the ammo, put the ammo in the gun, and pull the trigger. In other words it is difficult for a chain of command to do something to you without you doing something to initiate the action.
Be honest and sincere. Accept responsibility for your actions and do the best you can. This will likely be enough to restart your relationship with your chain of command.
I have provided two extracts for you to read with regard to your question. Read these extracts and educate yourself on the process and procedure. These are attached below.
Look at it from their perspective
Having spent a lot of time as a senior leader at the Platoon Sergeant, 1SG, and CSM level I can assure most commands do not take any pleasure in separating a Soldier. They would rather see a Soldier excel. They have a lot on their plate and do not have the time focus on one individual. Your goal should be to ensure that when they think of you they see a responsible and reliable Soldier. Depending on what has happened this may be easy or somewhat hard, but it is definitely possible and it will all start with a little communication.
Now with all of this said understand that most Soldiers go through a period like this during their term of service. What makes the difference is how the Soldiers chooses to handle the issue. There are bad leaders and I understand that, but you must trust that most leaders: (1) do not try to be bad leaders, (2) are unaware they are bad leaders, or (3) do not care. If you are working for a bad leader someone in your chain of command will realize it as you go through the process. Your best course of action is to do the right thing–even when no one else is looking and trust your chain of command.