Preview not combining images into PDF

Preview used to brilliant. Like any Apple apps. (cough, cough).

I used to be able to open several jpegs in separate windows, then drag the thumbnails into a new files and save it as a pdf.

Now. I ha e no idea what is happening. Preview opens them all in one document, I save it as a pPDF, sometimes all the images are there, sometimes on pone, sometime keeping Landscape as opposed to Portrait....

And then, when I attempt to print, the images no longer fill the page, what ever orientation they are in.

To add insult to injury, when I go to print, it never finds the default printer, I have to select it. I cannot save a preset, and I have to set everything every single time.

I eventually, printed each jpg off separately, going through that process.

And to top it off, unlike on any of my other 5 Macs, the mouse doesn't click properly. To highlight the text in a folder, I have to slowly click, then wait a second before it highlights, if I do it normally, the file will open..

Grrrrr.

Let's focus on Preview.

Any ideas