Facebook Pixel Problem


Hi, in the past day Facebook change the way pixel get information and whit this give me a lot of problems.
In the past I have my personal conversion in the thank you box and count only when people get there, but now the pixel track every single person that get into de landing page. So two questions:
1.- How can I edit just the button code? is posible?
2.- Anyone another solution for this situation?

Thank you so much.