That means the mcp23017 part you downloaded is misconfigured and thus broken
Try the corrected part in this .fzz file:
to get the part you need to load the .fzz file in to Fritzing and then right click “new part” in the temp parts bin and select export part to write the part as a .fzpz file to the file system That should give you the new part ready to be loaded in to Fritzing. As to your first question, you have to manually place the parts in pcb view there isn’t a way to automatically place them.