I did noticed a difference in your cron,
mine: * * * * * root GZIP="--rsyncable" /usr/local/directadmin/dataskq
yours: * * * * root GZIP="--rsyncable" /usr/local/directadmin/dataskq
You mis one * -- at least at what you pasted, and Im not sure if it would make a difference since the backup is being made as you say.
Other thing I could think of is to check gzip --help, it should say "--rsyncable Make rsync-friendly archive" in the list
And what OS are you running? I had this working on debian, there may be a difference. Must say I don't use this rsync setup as it took more time for me than just downloading the whole thing.