Did you ask if they'll add the new 60 days onto your current expiration date? As opposed to 60 added on to application date. This morning I saw one report from promenada: adding 60 to application date.
nothing abnormal, one copy of passport first page and one copy of each extension. The covid extension forms, overstay forms etc can all be done in office.
When does your current stamp expire? This week CM immigration told me that they'd add 60 days on to application date, not expiry date. I'm end of April so I decided to wait.