I'm unaware of any Tampa Racing mods being stubborn. I'm unaware of any Tampa Racing mods trying to throw their weight around. I can scroll up in this very thread and see that we actually did try to help you.

As of 6AM 23 November:
Since 21 August to 23 November 2014, 214 people have joined Tampa Racing .
These numbers can be verified by going here:
https://www.tamparacing.com/forums/forum.php
and scrolling down to the bottom of the page.

I have no idea why those people are not having trouble and it's only you.
Did you ever change your browser to a better one?
Post #17 above in this very thread, contains the instructions. Did you try using them?

As for coming up with a solution,
In August within this very thread, this is what was said: (and anyone can scroll up to read it for themselves)
It was fixed months ago according to post #3, and it was fixed to what most people at that time said that they wanted. As a guess, if there are bunches of for sale ads being posted on Tampa Racing.com by others, it's possible that most of them have found how to do it.

What specifically are you trying to post? Care to send me a pm containing it, so I can see if I can post it?
Or is this the same thing you said you didn't like when you posted back in May at the top of this very same thread? You can also Send a PM to IB Tim and bring it to his attention.

BTW, you really had to dig to find this thread. I see only three things you posted between August and November.
As to your allegation that classifying ads by car type was "discrimination" you might read amendment 14 to the US Constitution for the definition of what legal discrimination really is. Most classified ads (including magazines, newspapers and the internet) of any classified ad, are by some kind of classification.