Same here but 57.I should have noted that I don't have any physical limitations, age 56.
Just starting back after a 20 year break, it was a combination of DW and HW that were making it difficult for you. When you dropped the DW 2#, you may have dropped the holding weight 3-4# which is what provided a more stable foundation for you. You should slowly work on building your strength back up to manage higher holding weights.Hard to believe 2# would make that much difference. Maybe those previously unused muscles are getting a little stronger too.