Either a group by or a second sorting column would be a nice feature to have in glide tables.
It would prevent an error that sometimes happens in tables only (that I have seen) where you input the data and a few seconds or minutes later it swaps the order of the rows inserted.
If you could:
Group by column 1, or sort it alphabetically throught column 1
Then use another sorting for column 2
you could use the second sorting as a safety mechanism (e.g. keep the time of entry as a second sorting to prevent row swaps)