The game only reports a guild bank balance while the guild bank window is open. Warband Accountant records it when a Guild Master opens it, then shows that stored balance on your other characters.

• The Overview shows a Guild Bank balance for your tracked guild.
• Alts in other guilds can display your Guild Master's bank instead of their own. Choose which one in Settings under Track Guild Bank For. Only guilds a Guild Master character has synced appear in the list.
• If you are Guild Master of two or more guilds, a Guild Banks tab appears with every synced guild, its gold, when it was last synced, and a total across all guilds. The home guild is tagged (Home).

The number is a snapshot from the last time a Guild Master character opened the bank. It does not update on its own, because the game does not allow it. Open the bank on the Guild Master character to refresh it.

• /wba resetgm resets the Guild Master cache.
• /wba clearguild clears all cached guild bank data.