1-The footer number of columns is assigned in General Options > Footer Config. Then you add content to each column. The content consist of widgets. Always! So the moment you see a widget missing (could be any reason), just go to Appearance > Widgets > Footer column 1,2,3 etc. Add the missing widgets here.
Such thing can happen in case of theme update or wp update, when you had a very old version prior. look first in the “Inactive widgets” area (screenshot). You missing widgets could be here. Drag and drop to the correct place.
2-All wordpress sections (revisions, visual composer content block, General Settings etc) can be opened/closed, drag and drop to change posistioons. See screenshot: https://postimg.org/image/gu98dxhol/
3-To change email, go to Settings > General > Email Address.
Most probably you only needed to clear cache. Some times the server is slow in reflecting all changes. However, good to know it’s k now.
Let us know if you need further help.
