MS Word is notorious for including font markup when you copy and paste text from Word to many web platforms.
If your fonts look odd or inconsistent, it is likely that you have Word markup manipulating your text.
To check this, you can click on the Source button in your text editor. Clean text looks like this:
Text copied from MS Word often looks like this:
You can easily this this up by:
1. You don't need to click Source -- edit your question in the regular editor view
2. Select all your question text
3. Click the Remove Format button and then save your question: