Could you please confirm the version of Photoshop and Lightroom that you are using?
Does it happen with only those specific files that you edit in Photoshop from Lightroom?
If possible, share a screenshot of your Lightroom export window so that we can assist you further.
I currently am using Photoshop Lightroom 4.4 and Photoshop CS6.
The other problem I am having:
When I edit a photo I imported in Lightroom, then I exit it in Photoshop CS6 and save it, any Lightroom adjustments I make to it after that it is not exporting with them. I will try to show you what is happening, just give me a minute.
Yes, it would be good if you can share a screenshot of your Lightroom export settings.
Also, do you get all the edits if you export an image only with Lightroom adjustments (the one which has not been taken to Photoshop) ?