1.

there does not seem to be any option to fix your wall position on centre, or either edge of wall - it always centres it seems

this makes sizing and dimensioning very messy - because, say wall is at say 21m, with thickness of say 100mm (for simplicity), then edges of wall are now 20.950 and 21.050.

which then subsequently makes accurately aligning abutting walls a time-consuming pain

and lengths of abutting walls odd lengths

is there a solution/fix/work-around for this?

2.

relatedly, espec given the above, do you align abutting walls in the centre - which leaves an odd corner? or do you drag it to the far edge of the abutting wall? or do you drag to the near edge of the abutting wall?

and both of the last two mean odd wall lengths if walls are based on wall centres.

what is standard practice?