Thanks for your inquiry. We have tested the scenario and have managed to reproduce the same issues at our side. For the sake of correction, we have logged these problems in our issue tracking system as follow:
WORDSNET-15258 : Images are lost after conversion from DOT to PDF
WORDSNET-15260 : ODT to PDF conversion issue with text position
You will be notified via this forum thread once these issues are resolved. We apologize for your inconvenience.