If disabling it doesn't homogenize them when you're a Brewmaster you can copy the settings from your Mistweaver's profile by finding 'Copy from' near the bottom of the Profiles configuration area, and it will overwrite the layout.

As for switching between specializations you've probably enabled dual profiles under the Profiles section on the ElvUI configuration.

If you're using the 10th actionbar for whatever reason you can change 10 to 9, or 8, 7. You could also do it as mentioned earlier in the thread but this way actually makes mental sense to me.

Under Actionbars - Bar 2 (or thebar you want to switch as well): Add '10 ' without the quotes to the Action Paging section.

Paging numbers can be a little confusing, and since monks don't really utilize many bars the easiest thing to do is something like this:

If you want it to switch another bar say, actionbar 2 directly above or below it, you're going to have to change the 'action paging' section under the bar you want to swtich as well.

Bar Switching: By default with any class that has a 'stance' or a 'form' only the primary actionbar will change.

Couple of things you've discussed that I hope I can help with:

Elvui action bars changing