fletch92131 wrote:Admittedly, the images from the latter often contained writing below the image
I think that is the clue. You have inserted the JPG image plus metadata (eg title, size, number of pixels) associated with the JPG. PowerPoint may not like it.
Whenever you insert an image always pass it through an image editor first (I use the free and excellent IrfanView) so as to be sure that you are working only with the image and not with metadata.
See
[Tutorial] Some useful hints on using images for a discussion on how best to handle images in Writer - it applies to Impress as well.
See
[Tutorial] Differences between Writer and MS Word files for a discussion of differences between AOO and MS products.
As a relatively new poster you will find much useful information in the
User Guides. May I suggest you bookmark the pages.
Press F1 to access the Help screen and search for your problem. When a pop-up window opens, click the Help button for extensive help on that function - it is often more comprehensive than the manual.
Showing that a problem has been solved helps others searching so, if your problem is now solved, please view your
first post in this thread and click the Edit button (top right in the post) and add [Solved] in front of the subject.