Not sure if it's allowed to be posted here but I've discovered a repeatable process for overfilling your squad center over the maximum capacity. You can basically almost double the amount of troops you have in your squad center. If exploits are allowed to be posted here then I can share the details.
There are some limitations to this exploit though. If you attack and deploy your squad troops it will glitch your attack automatically and you will lose with battle log showing 0% damage and no troops deployed. If you want to get rid of the troops for some reason use one of the missions on tattooine or dump them during a heroic defense.
Overfilling the squad center in no way benefits the user. If you use it on attack, you get an error and lose everything. It can't be used on defense, since the game corrects itself once you log out. So.... what's the point?
It has been a long standing error, relating to the chat lag issues if I remember correctly. You will usually get an error if you try to use sc when overfilled. Restart the game to resolve the issue. I remember a couple of years ago when it was common. I lost many war attacks when I hadnt double checked sc numbers.