I clicked "Create alternate layout" in my InDesign CS6 document without really understanding what it was for, to try and fix an margin problem I was facing. Now the document has been split into three parts, A4, A4 V2 and A4 V. Undo did not remove this partitioning, and I cannot get it back to how it was before. The document was separated into three groups, with each page being in only one of them. So they are not duplicated, as I understand it they should have been. So the original pages 1-14 are in one layout, 15-31 are in another, and 32 in it's own
What are the consequences of having alternate layouts, and how can I get back to a single one?