New graphics in head is obscured

[jrasicmark]

I was given a document that was saved as Word from an Acrobat PDF; they need me to resolve all of the formatting problems that resulted, but this one has me stumped.
Naturally, they don't have the original Word document that it came from and they need to revise the text.


They've got the wrong logo in the header area. When I bring the correct logo in, only a sliver of it shows up (the bottom), even when I re-scale it to the same depth as the old logo that is already there. What could be hiding most of the new logo and how do I fix it? Is there a way to select the old logo and just choose "replace"? The new logo I'm bringing in is a TIFF if that makes any difference.