Its really a matter of what the 1099s were issued for. Are they all issued for the same business activity that is related to the LLC you have? or for other, side work, or freelance work you do, that's different than the line of work your LLC is for. All income related to the same business activity should be reported on the same Schedule C.
I received my 2019 1099 under my SSN vs. my LLC from which my business taxes were filed. I reached out to the vendor whom I worked for a corrective form who told me to contact IRS. Is this correct?