Difficulty formatting post with images

Don’t know if this is the right place to post, but need some help. Taking over maintenance for my company’s blog, but I’m a novice to all of this. I can insert images into my post, align them where I want them to be, and the text wraps around them. All looks good, until I go to preview it. All images then appear on the left with the text either above or below. Why the discrepancy in what I see in the editor vs. the preview? Any help is much appreciated. I no nothing about code so I’m hoping there is something simple to fix this!