per the IRS says having two EIN's is okay.
You will not be required to obtain a new EIN if the following statements is true.
A new LLC with one owner (single member LLC) is formed under state law, does not choose to be taxed as a corporation or S corporation, and has no employees or excise tax liability. NOTE: You may request an EIN for banking or state tax purposes, but an EIN is not required for federal tax purposes.
here's a suggestion though. use the LLC's EIN for all business purposes.
by the way should you start another business, whether or not as an LLC, and not electing partnership or S-Corp status, the IRS says you should not obtain another EIN.
