Hello,
i've got some issue with exporting bxl file which can be downloaded on your site. I'm trying to create lib for ADS1298, so i downloaded file and use UL to convert it to Altium Designer. Following instructions i got the lib with ADS1298, but footprint is incorrect. What's more UL convert this element for Eagle properly. Has anyone have this problem? Could you try convert bxl file to Altium to check if it's correct and post me back or send converted lib to me?
This is the result : 
As you can see, pads are placed wrong and overlaps.