OK, you need to verify the version of AutoCAD that the other company is using. It may be an incompatibility issue with the formats. If the other user is using R14, then it very possibly is compatibility, BobCAD uses the latest DWG and DXF data from OpenDWG.
As for the Text: This may be encountered some times. This is because AutoCAD has special characters that can be placed in Dimensions and Texts, BobCAD does not support these. It may be that the text is being output and resembles these characters.
You can try Vectorizing the text before you save the file. This will make the text hollow, but it should remain in the correct orientation.