I've stumbled upon this a few times now where the hex will be the same in both files but the maps will display something completely different.

I am using a defined d@mos to help me locate maps in an undefined box, but this keeps happening to me... I will located the correct location, the hex/value will be identical in both bins (red boxes) but it will show different results in the defined map then in the working d@mos.

Anyone have any ideas?

screenshot of what I'm talking about:

Absolutely normal behaviour 

You need to transfer the conversion factor/precision as well (from the damos project to the other project)
Look at the map properties in the damos project to see factor/offset/precision/sign. Then transfer them.
Then they will display exactly the same.

HTH
S.

use the "transfer map" function, and it'll copy over all the relative conversion and factor data for you