I am having a similar problem with UA and UU.
The add-ons available on my Guild Site's UA are:
Advanced Trade Skill Window
Character Profiler (required)
Chuck Norris Facts
cMinimap Coordinates
EquipCompare
Gatherer
Guild Event Manager (required)
Outfitter
PvPLog (required)
XPpercent
After poouring through the forums and correcting everything I could find, I am still having trouble. Below is a description:
1. Problem started after myself and other guildies updated UU to 2.6.1. I was still running UA 0.7.0. One of my guildies opted to try an optional Add-On but reported that it wasn't downloading. I figured it was a compatability issue with UA and so updated to the latest (v7.5) this morning
2. Installed new UA and uploaded Add-ons as with older version of UA (Interface/addons/{addon name} structure). Noticed that UA was pushing them into the same structure so I'd end up with Interface/addons/Interface/addons/{addon name}. Removing Add-ons and uploading the bare zip fixed this issue. I also removed all spaces from Add-on names per the above posts.
3. After correcting the directory structure issue, my 3 required add-ons Downloaded and installed upon synching. I added the other 7 and tried them, but only the required ones would download. I made all of the addons required, but only outfitter, PvPlog, Guild event manager, and Character profiler would download.
A little baffeled as to what's going on here. I've uploaded the debugger file for review.
My guild site:
http://www.freeknightsalliance.com
Uniadmin panel:
http://www.freeknightsalliance.com/uniadmin
Any help you could lend would be most appreciated...
Thanks!