I placed L1 horizontally. Then used the create array function with circular.
After the placing, There was a misalignment. The L1 is moved lower than original position. Look at the picture.
In the meantime, as this causes a “barrel shift” effect, you can use “Move Exactly” to rotate the whole thing around the centre by one degree.
And in answer to the obvious next question: “can you add a way to add a fixed angle to all items in the array?”, an offset parameter for the angle is already present in nightly/v10.
Probably you are using the “rotate around selection centre” and because those dimensions are on the outside edge, the selection center is somehow not dead centre.
It’s a bit fiddly for now, but you can move the local origin to the centre for this purpose and then rotate using that in the dropdown.
If you have a little offset like this but the angle is right, you can then use Position Relative or Position Relative Interactively to set the offset correctly.
(in the menu that was cut off, I selected Positioning Tools → Position Interactively)