Post a screenshot of what you see. Also I see you're in Europe so be sure to check out Access Grid Lines v. Grid Dots.

Just adding on here -

Richard isn't perfect at aligning things to the grid either.  ( I know hard to believe right? )
He does make it look easy because he's done it so long.

If you watch enough of his videos, you will see and hear him complain about Access not aligning to the grid when you add objects.
Just one of his items on a long list of things for the Microsoft team to fix.

Then you will also see where he says to select all of the objects, Right Click --> Size to Grid, Right Click --> Align to Grid.