Ok, update to this... it seems to be all Vasari forces. It actually seems like their engagement range is WAY low even if it's set to gravity well. I just jumped into a gravity well and sniped the starbase located there, meanwhile the enemy fleet (who were also Vasari loyalist) just kinda sat around the planet and watched me do it. They didn't move to engage until I was much, much closer.

Wait, I can jump Dark fleet ships into it, but not any ships previously built.... is this how it's supposed to work or is it supposed to function as a normal beacon?

All my ships that took part in this battle were in a fleet, all of those ships were manually bound to a control group. All those ships were selected during this engagement.

I am not sure if the titan is a modifying factor in this, I will try it in the next engagement without the Titan. Auto-attack was on, and was set to (all auto-attacking)

I will explain the engagement below.

(Note: This is played on EASY AI at the moment. I always play every AI when I play on 5 star maps, and I progress up through the AI as I win one map after another. It's how I test the AI to see if they do smarter things on one setting then they do on another and to see when they stop doing idiotic things.)

My fleet consisted of the following ships:

1 Vorastra Class Titan - Level 2

1 Kortul Class Devastator - Level 4

1 Jarrasul Class Evacuator - Level 4

1 Skirantra Class Carrier - Level 4

1 Vulkoras Class Desolator - Level 4

3 Lasurak Transporter

12 Skarovas Enforcer

9 Serevun Overseer

20 Ravastra Skirmisher

11 Junsurak Sentinel

19 Kanrak Assailant

2 Stilakus Subverter

15 Tosurak Corvette
(Various Strikecraft)

Enemy Fleet consisted of 1 Titan and other ships, I didn't get a good count but I do know he had a titan (loyalist)

My fleet engaged from the left side of the map when they dropped out of phase. The enemy fleet consisting of a Titan and multiple other craft were on the opposite side of the planet itself, hugging up against it. I immediately was engaged by a non-upgraded Starbase which should have aggro'd the rest of his fleet, it didn't. The only thing that engaged my fleet was his strike craft which came from all over the gravity well to do so. The interesting part of this was the strike craft attached to his fleet itself engaged but the ships did not, they stayed back. At first I thought this was an AI thing in which maybe the AI didn't engage because they wanted me to come to them while the strike craft weakened me. My titan and Junsurak immediately began dealing with strike craft all around me while I slaughtered the starbase. I then let the AI do it's own thing.... which I saw was ignore the enemy fleet (which was quite sizeable) around the planet and engage everything else. I literally had to tell my fleet to move to engage (not attack move, but move towards them) for either of the fleets to notice each other. Prior to this I had a small engagement where I fought some of his cruisers and frigates in another gravity well. Even when I used the command for my ships to move up and attack they didn't.

My ships started to move forward to engage the building but then for some reason all fell back to (Reforming fleet). This has happened a lot and I am starting to wonder if the engagement range for the Vasari loyalists is messed up somehow.

Another interesting bug with Dark Fleet. It seems, that when you summon ships from the Dark Fleet then they are free. All you need at this time is 7k resources, 3k metal and 3k crystal. Then you can hit all three buttons and get a capitol ship and a varied amount of smaller ships. The ships cost nothing but fleet supply and they do NOT take away from your resources when they come in.  I tested this on all my Phase Stabilizers (even the one summoned by the titan that's free as well) and none of them share the same cooldown. So in essence you can put a crap ton of these things down in a gravity well in some random area and... instant fleet. Again, this COULD be working as intended but that seems a bit overpowered to me if it is. With this I could just throw away an entire fleet (except my titan, who can simply phase jump away if the shit hits the fan) and jump back to a -home area- of phase stabs. Then summon in my full capacity of fleet size and whamo, instant fleet max again. Mind you they would all be level 1 capitols but that's nothing a little upgrading won't fix.

Edit 1: Ok small edit, it seems capitol ships DO eat up resources, but not smaller support ships. The only thing they eat up is fleet supply. On a side note, this could be because the icon that you press to summon them in has no value noted, BUT if that's the case why would I need to have a certain resource amount before I can summon them?

Try setting Fleet Cohesion to All Loose, this would cause the rest of the fleet to engage enemies in a wider area around the fleet leader.