[galaxy-dev] .gz extension gets stripped off when uploading via data library Upload via filesystem paths but not via Get Data -> Upload File

Hello, We've created a new binary datatype for .fastq.gz files following the same methodology as the BAM files since we don't want our fasta.gz files to be gunzipped. I added the appropriate code in upload.py to make sure of this. This new datatype and extension successfully does not gunzip our files. But when we upload it into a data library via the data library "Upload via filesystem paths" it for some reason automatically strips the .gz part out. When we take the same .fastq.gz file and upload it via Get Data -> Upload File it works fine, nothing is stripped from file name. Where is it doing this and how can prevent from stripping the .gz via the data library menus? thanks, Leandro