When you run OCR, make sure to click on the "Edit..." button, and to set the output type to "ClearScan". Otherwise you end up with an image and hidden text. This way, the image gets completely removed from your document, and when you export to Word, only that recognized text is used.
To fix the mis-recognized characters, use the "Find OCR Suspects" function and fix them in your PDF document before you export, or fix the problems after you exported in Word. OCR is not perfect, and the results depend on the quality of your scan. Sometimes, the OCR algorithm just cannot figure out what a character is.
Thank you so much for your prompt reply. Sorry I haven't gotten back to you sooner. Changing the settings to ClearScan has greatly enhanced the text, and removed any scrambled characters. But I am still having a problem getting the text itself to change into portrait with word-formatting. If I simply change the orientation, the page becomes scrambled - there are missing characters, the format is so messed up that almost nothing fits, and so on. Hence, the format is still, like the scanned document, in landscape. If I copy and paste sections of the landscape to make a portrait-style document, it ruins the format - nothing is aligned since it retains the landscape-formant but only on a single page.
If you could help with this aspect of the problem, that would be greatly appreciated.
This was a problem with Word and not Adobe Pro, I figured it out. Thanks again for your help!