past conflict with current supervisor

[doctor-to-be]

It's been many years since graduating with my Master's. I have a ton of work experience and am applying to a doctorate program. This asks for 3 recommendations. There's no way for me to see these (providers electronically send these to the school). The application allows for more than 3 recommendations. 

1)Would it hurt me to have 5 recommendations (2 more)? 

2)My supervisor and I have worked together for 7 years. Most of this time has involved us getting along, but we earlier this year had a major conflict where he wrote me up (first level warning) for something which I believe was extremely minor. I don't believe that I deserved to get that warning. Since that "blew over" things have definitely been better between us, but I've been really worried about if I should use him, as I have to trust these recommendation providers. In our talk about this today, I started off by saying that I've hesitated to ask him for a recommendation because of our recent conflict. Then: Boss (B)-everyone has conflicts. it happens. the conflicts we've had never changed my feelings toward you. I would be happy to do this for you. Just tell me what the school requires. I believe that you have a brilliant academic mind. He then mentioned a couple of other strengths of mine. SO should I trust him or would it hurt me without using a supervisor for this? 

[rising_star]

Here's my advice:

1) Trust no one.

2) Don't send them more than they ask for. Think of it this way. If you send 5 recommendations and they only choose three to read, can you guarantee that each of those three will be equally strong (and better than or as strong as the two they don't read)? If not, then you shouldn't send so many recommendations.