Weird characters, and lines not aligning

[Xavier]

I am undertaking a fairly massive project involving thousands of pages.
I had to scan a lot of PDF pages that I OCR'd into a Word Doc.

Sometimes I get some pretty funky things thrown up by the OCR. Can anyone explain how I can remove those characters. If I copy them to do a Control+H, to replace them with nothing, they come up as real characters, such as the letter 'I'. The font and size in the document is uniformly set to Calibri (Body) 11.

Also, why are some words scrunched together, such as the "JW Chamberlain" in the attached document and image.

Then I am having troubles with some words going out of alignment in the line.



Take a look at the word EXHIBIT, that appears twice, and the second one is lower than the first one.

Please help. This is doing my head in.