Missing damage

Wanted to ask u guys if anyone else got some dmg drop issue. Like a day ago i was at like 5.3-5.4 attack on warrior(full buffed), thats kinda standard for full str, gm rr'ed stuff (no pre eles, free acc[except amulet] and cape). Suddenly i lost like 150 attack. Lemme show u some pure math with my stats.
1STR=1.3 attack, 1DEX=0.25 attack for those who dont know so formula is like:
Str*1.3+Dex*0.25+Weapon att power+War passive(strength training)+2h passive=overall attack power so in stats now:
(722+1703)*1.3+(12+1481)*0.25+1361+58+75=3152+373+1361+58+75=5019
I assume 5019 should be my unbuffed clean maximum att power unfortunately somehow im at just 4869 which makes it 150 less.
Here is the ss of stats: http://prnt.sc/d1ctad

I'd be glad if anyone can reasonably explain me this.
I can just add one thing, that this dmg drop occurred after i used random runes to swap some stats on my GM rr'ed gauntlets.

meow

I've kept the same build on my Fighter since I've started the server and I haven't noticed any decrease in attack power

for now you wont notice anything , try gm rring , moving stats , log in log off and youll see . xD

Full str

Self Buffed - https://gyazo.com/238cb41aa7bd881e1e2078fb32d765a7

No Buff - https://gyazo.com/920175c76da06b9c7e00d426e5fbc095

With party buffs - https://gyazo.com/cf63d872af1ad6e7ccad45a720f23d48

Other says they have 5.4k attack with full party buffs . lol

5.6 on fighters in my guild

A bug was remove this week about Enchant fail on Helmet who add 300 attack. So this is why you lost 300 attack. Now you have your real attack.

i always have that kind of issue...but over all, i just go for kept hitting my target, until it down...
well, as an hunter, i have to kept vigilant on everything...i always do the hitting, even if, sometimes, ive get missed my target...which is not gonna make any sense...