Duplicated vendor's name in while assigning.

Problem:

user can see duplicated name of vendors when assigning.
When I look for the supplier in Suppliers tab there is only one occurrence.
When I assign however the same vendor is listed twice, sometimes even with different prices.

Solution:

generally this issue occurs when you have two pricelists for your supplier.

Then when assigning you will see the supplier twice, each instance with another pricelist.

To check if you have two pricelists go to your supplier and select Prices and click on the drop-down menu, there all pricelists assigned to your supplier should be visible.