I'm using Chrome and it works fine, so it should be something in your end. Are you running the last version? If not, update it.

Did you try disabling any running extensions? Did you try using another browser?

You put 4 games and 4 keys. Either put 8 keys or 1 key and make it clear in the notes that you want 9.

Email helen [at] tf2outpost [dot] com and explain what happened. Don't forget to include uncropped screenshots of your Steam Support ticket.

We can't just ban an account like that, we need evidence that you own the account.
Can you login in OP using your current account?

He's already banned from the site.

https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/864976115256395683/#c864978109594368537

This has been suggested already.

Bazaar's user base is considerably smaller. Do you think it's possible to have enough bots for half a million accounts?

Also, automated trading is not the goal of the site.

https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/6/864976837872811187/

https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/864973980900606552/#p1