Minting multiple NFT from Factory Contract optionid

[ajaybha]

Hi,
Following the tutorial, I have a factory contract which uses the referenced NFT contract's mint function to mint the actual NFTs.
I have two options, 0 - single mint, 1 - mint 4. and I am able to go to opensea.io//{optionid} and create a list/sell for a given option.

1. A user (different wallet addr) is able to buy once from the option-id (either 1 or 4 based on which option). But second time, it throws an error about either gas fees being low or item already being bought in the interim.

The listing is still active though. I checked the documentation on open-sea but still not clear whether multiple NFTs can be minted through the same listed option in this factory pattern.

Appreciate if someone can shed some light and hopefully show how to do this.

Regards,
Ajay