There was a glitch where, after playing for a while, my minions stopped collecting resources, stopped healing, and stopped hunting, etc. They simply kept running about.

It can be really difficult to equip new men in a fight even if you're stocked up on resources.  If you have the resources there should be a button to upgrade new men to the level of one that just died.

There is a bug which happened few times to me. I attacked player inside his fort with no towers (just walls). Player seemed to be afk. I killed everyone except his archer, who stand between my troops and fire arrow on them. I was no able to target him any possible way, making player invulnerable. 

How about adding ballistas to help defend castles against attackers? 

After they were attacked by bandits, the stationed troops would go to the biggest enemy far away.

On the 17th of October, I stationed my troops at the left bottom meadow of the map in tribes mode.

I saw that they were attacked from far away, so I went there to help them out.

After the bandits were killed, the stationed troops collected a box that were between the two nearest meadows.
They wouldn't return to their post after that, they went off to the biggest tribe in the middle of the map.
None of my troops were missing before that, so I do not believe that the #1 player had attacked their meadow.