innovus create offgrid viacuts

when using innovus, it sometimes create viacuts that are offgrid

the vias themselves are on-grid but the metal around the vias is sometimes offgrid (e.g. it has 0.001um offgrid placements, while the vendor requires things be on 0.005um)

on a small design, they can be fixed by hand, but on a large design the number of issues explode easily in the thousands.

on a large design the set_verify_drc_mode innovus command is not an option, since it is much slower than other DRC checkers (and it often get stuck).

So I would like to do all that it is possible, to have innvous not making the offgrid errors in the first place

1) I think innovus is aware of the grid being 0.005um, as most of the shapes generated are on a 0.005um grid. But I am not 100% sure
Is there a command to set (or get) the grid spacing in innovus?

innovus seems to have a grid command, but I cannot find the usage in the manual nor in the various Cadence training
even the -help option is not helpful
(so I am not sure if it is indeed defining the grid)

innovus 5> grid -help
wrong # args: should be "grid option arg ?arg ...?"

2) alternatively, is there a an innovus command to "extend" (e.g. overlapping an additional piece of metal) the offgridshapes, so that they snap on grid?

thank you