Bug Found /auc C And Wrong Item Auc

So when I do /auc 1 1000, it suppose to auc the that one item that was suppose to be in my hand and then switch to my god sword to fight some mobs. It suppose to auc that one item and not my god sword. Some how it auc my god sword and when I do /auc c, it cancel my auc. It suppose not to cancel my auc :/ This is a bug. In the past, I was able to auc an item doing /auc 1 1000 on my spawn egg and I fight mobs with my god sword at the same time, and the auc go to my spawn egg. Now this time it go to my god sword

 

I'm scare to use my god kits now while my item is up for the /auc

 

one more bug found. I did /auc 1 100 on my creeper spawn eggs, it change to 1000 :/

 

forgot to add more detail about that /auc c. My auc was up and I did /auc c. It cancel my auc. Suppose not to