Wall Upgrading Problem

[g0rning]

It looks that you have very few level 3 walls, so it's harder for the bot to recognize them.
Currently the wall upgrade feature upgrade about 90% of the walls.

Although that may have been true. I manually upgraded all my walls to level 4.

I tried using the auto wall upgrade feature from level 4 -> 5. Same problem even though ALL my walls are level 4. Yes I know it can't upgrade because of I need to upgrade to TH5. However It selects the wall but never attempts to presses the upgrade button.