mixed font styles/sizes in new listing

[rockz1101]

Mixed font styles and sizes continues to happen after a new listing is published. 

Why? 

I intentionally use the same font style and size, exception, when bolding words. 

[jeweloftheheart]

I have been having this same problem since last year. Sometimes I can get it to stay if I revise it in one browser and then go to another and revise it in there. Usually takes several tries.