Yes, it's a bug. Yes, they won't pay for it. Yes, likely there is a lot of other stuff that is buggy as hell too. Yog is just one example of another bug that was recently found. I bet if every item in game was tested you'd find this type of bug that costs people money all over the place since the system isn't adequately tested on each and every item in this massive economy run by a small handful of individuals... Yes even if the bugs like this are found and reported to Mindark via support support may not forward it appropriately are mork it as important enough for anyone else other than the underpaid support person to ever view it. Yes, this sucks...
A while ago I tried crafting a lot of various items I had blueprints for. I'm also looking at lots of items in auction, etc. If you look close enough you'll see many, many items in game have item info stats that are not uniform with other similar items of the same type. More than likely these type of things are the result of similar type of bugs, etc. where there are just so many darn items in game the guy coding the stats got lazy and thought, "oh no one will ever care."... so copy/paste and walla we have incorrect stats, items that don't work, and items that have typos in info screens, etc.
If you do some research on the history of bugs, exploits, buffs, etc. you'll find many changes (i.e. nerfs, etc.) have happened since this game started. Stats get changed on items all of the time, things get altered all of the time... estates get changed all of the time.... despite the devs saying they don't like to change stats, etc.... nerfy nerfy nerfy NERF...
It would be interesting is someone could compile of list of every blasted change, and bug that has happened like this over the years so it's more apparent what the hell is going on. Some have attempted in the past, so if you do some searches on this forum and others you'll start seeing the patterns. Yes, it is quite unsettling to see how much at risk things in this 'safe' virtual economy are.... poof your 'investment' is no longer worth anything... your promised stats are wrong and worth a lot less than you thought... Your hallway in your apartment is no longer functional, your booth or shop no longer works, your great LA now has hills and is turned around so the once amazing location is now useless back woods that no one wants to cross, your 2x0 no longer is doing the damage it once did, your A105 is no longer giving the damage it once did, your UL weapons are no longer so great vs the L alternative, your decay costs increase more than they should, your tt value of the repaired ar,pr is now more than the maximum value of the item since they lowered the maximum tt value so your actual protection from that armor is altered, your pet's maximum total food capicity has been lowered to a level below the last time you fed it so now your not sure you are getting the buffs or experience you should be for same amount of food you already have in it's belly, your L hammer is now UL but you are not sure if it's giving you the same level of decay it once did, your items that once only decayed down to 50% decay down to 1% but you are not sure if that decay is returned in loot in the way it should be since Mindark randomly made that change but didn't check the behind the scenes math to make sure the numbers do what they want them to do, no no longer 'own' estates only 'hold them, your buffs are at a level that are higher than the maximum the system allows so you are not sure if that overage is really working or not, your pills are doing weird things with buffs and you are not sure if it affects decay costs and there's very little ways to check, your item is rare and acting weird but support won't do anything about it since no one else is reporting the same type of issue, etc.
Folks think that those that study history and stats are wasting their time, and in some ways they may be right, but in others, they see the bigger picture... Wiki entries get outdated or obsolete... tutorials no longer give the right info... it's a horrible mess.