Baking soda can raise your pH. I would simply add acid to bring it down. You don't list your CYA/stabilizer so if that's low the easiest way to add acid and stabilizer is tri-chlor pucks--but just temporarily until you hit desired levels. Or you could add either dry acid or muriatic acid until it's right.

You have a vinyl pool so too-high T/A is not any problem unless it reaches about 200ppm AND your Calcium levels reach about 400-500ppm.

I wouldn't be concerned.

But there's a lesson to be learned here: Unless it's chlorine, NEVER add any chemical to the full amount recommended. Always add part and wait, then measure, and then add more IF NEEDED. Otherwise you will find yourself over-shooting your desired goal again and again.

With chlorine, the biggest risk of adding too much is bleaching your liner, but that's about it.