Wall Level 9 --> level 10 issue?

[clashpimpnj]

Try to mix the level 10 walls with the level 9 and see

I can get it to work if a lower the setting "minimum gold to keep" - I think its a math issue, maybe because the buttons say 2,000,000 gold or 2,000,000 elixir. If I leave it at Kepp min. gold at 1,000,000 works fine. If i raise it to where I liked to keep it, 5,000,000 - it doesn't work.