Editing cell text not working.

I’m trying to edit the font size and color of text.
After highlighting an entire cell and click the font size, it sometimes works and sometimes doesn’t.
If I carefully highlight only one line at a time, I was able to get it to change font size. It is very touchy and doesn’t work well. Maybe you could fix that.

I’m trying to change the font color in a row where I have black and red text. I highlight a section I want to make black and after editing the color to 000000, it doesn’t let me change it. When I add black to the color popup, it still has red on the left half of the little display and has black on the right half. But it doesn’t let me click on the black section.

Thanks for your help!

Here is the table
https://heartledliving.com/become-a-member/