On my Schedule A 1040 form, my property tax amount that I paid was listed on line 6 instead of line 7, is that correct?

It depends.

As you can see, Schedule A Line 6 reports Real estate taxes and Schedule A Line 7 reports Personal property taxes. They are both property taxes but different types. If you already filed your tax return(s), it should not matter too much since both lines are included on Schedule A Line 9 and the total itemized deductions on Schedule A Line 29. Please review the following link(s) and the link(s) embedded on the webpage(s) for more information:

• What's the difference between real estate tax, property tax, and personal property tax?
  
• Where do I enter the property or real estate taxes I paid in TurboTax Online?
  
• Where do I enter the Personal Property Tax I paid?