clean up some minor wordpress site issues

I have 2 sites built in wordpress they are the same site but one is in english and one in spanish there are some issues with how a section shows in firefox that needs to be fixed some of the text fomat is getting lost when you make a blog post and save some of the blog text is in italics by default.. dont know why I need the site to look the same in all browsers and need the txt formating to remain after save post and I need to have the txt in regular type by default (not italics) $30 to fix these