Yosemite Server Wake on MDNS Conflict and Wake reason ?

Question

A MacMini 2014 with OS X Yosemite server wakes up from manual sleep (Apple Menu, Sleep) every night.
Console / Logs says:
Jan 15 08:26:21 xxxxx kernel[0]: Wake reason: ?
Jan 15 08:26:21 xxxxx kernel[0]: ARPT: Wake Reason: Wake on MDNS Conflict
I searched the "interogation point" and "Wake on MDNS Conflict" reasons without success.
Also read
(http://support.apple.com/en-us/ht5394)
(http://support.apple.com/en-ca/HT201960)
Here are some prameters:
xxxxxxx:~ xxxxxxx$ pmset -g assertions
2015-01-15 09:43:55 -0500
Assertion status system-wide:
   BackgroundTask                 0
   ApplePushServiceTask           0
   UserIsActive                   1
   PreventUserIdleDisplaySleep    0
   PreventSystemSleep             0
   ExternalMedia                  0
   PreventUserIdleSystemSleep     1
   NetworkClientActive            0
Listed by owning process:
   pid 32(com.apple.serve): [0x0000001f00010133] 24:08:45 PreventUserIdleSystemSleep named: "org.isc.named"
   pid 32(com.apple.serve): [0x0000001f00010132] 24:08:45 PreventUserIdleSystemSleep named: "com.apple.server.filesharing"
   pid 32(com.apple.serve): [0x0000001f00010131] 24:08:45 PreventUserIdleSystemSleep named: "com.apple.ppp.l2tp"
   pid 32(com.apple.serve): [0x0000001f00010130] 24:08:45 PreventUserIdleSystemSleep named: "com.apple.collabd.quicklook"
   pid 32(com.apple.serve): [0x0000001f0001012f] 24:08:45 PreventUserIdleSystemSleep named: "com.apple.collabd.preview"
   pid 32(com.apple.serve): [0x0000001f0001012e] 24:08:45 PreventUserIdleSystemSleep named: "com.apple.collabd"
   pid 32(com.apple.serve): [0x0000001f0001012d] 24:08:45 PreventUserIdleSystemSleep named: "com.apple.collabd.notifications"
   pid 32(com.apple.serve): [0x0000001f0001012c] 24:08:45 PreventUserIdleSystemSleep named: "com.apple.collabd.expire"
   pid 77(hidd): [0x00007feb00090f08] 00:59:14 UserIsActive named: "com.apple.iohideventsystem.queue.tickle"

Answer 1

Just a follow up to my original posting.
Spalshtop is great for accessing my Macs from each other. I revived and old (2008) Macbook that I use as my media centre in my sunroom. Using Splashtop I can access my new Mac Mini in the basement and my iMac in a separate room on the main floor. I have a lot of reasons to access one Mac from another, which I will not go into except to say the main reason is being too lazy to go from room to room when I want something that is specific to one of the Macs.
However, while I can remotely access another Mac, copying files between Macs is much easier with network sharing. Each Mac can mount the other's drive(s) and moving files between Macs is a breeze. I just wanted to reinforce one comment made in the original post, see below.
Two of the three Macs can be asleep and I can still mount their drives and move, copy, delete files remotely while they are asleep. Splashtop cannot see a computer when it is asleep and I have not yet been able to wake any of my Macs remotely. Once again, I am not network savvy and I have NO idea why I can mount drives on a sleeping Mac and play with its files yet I cannot access the same Mac remotely with Splashtop.
If anynoe has any ideas, I would love to hear them. I have not had any feedback from Splashtop support after a month; hope to hear from them soon.