If I correctly understand what you mean, we have the same problem. The maps are no longer aligned by corner (so that four smaller maps perfectly aligns with one larger) but by center (so that one larger map covers central parts of nine smaller maps). A 0 zoom map created at 0,y,0 covers -64, y, -64 to 64, y, 64 and when you zoom it out to level 1 it should cover -64, y, -64 to 192, y, 192...instead it covers -128, y, -128 to 128, y, 128. That's how it worked before the Bountiful Update but it shouldn't work like that NOW.
If I correctly understand what you mean, we have the same problem. The maps are no longer aligned by corner (so that four smaller maps perfectly aligns with one larger) but by center (so that one larger map covers central parts of nine smaller maps). A 0 zoom map created at 0,y,0 covers -64, y, -64 to 64, y, 64 and when you zoom it out to level 1 it should cover -64, y, -64 to 192, y, 192...instead it covers -128, y, -128 to 128, y, 128. That's how it worked before the Bountiful Update but it shouldn't work like that NOW.