Same thing happened with me yesterday evening....i applied on 20th june offline at delhi, University category....till now no updates...just reviewing eligibility...
Don't know buddy...even i applied on 20th june offline at delhi vfs...medical hasn't been updated. But another guy who applied alongside me got his medical updated on 21 july....they are updating it randomly i guess
Normally it takes a few seconds to match...but dont worry , there have been numerous cases where one was unable to link to gc key but they got their visa approval.
For sds you'll have to pay tuition fee for the whole year+ gic and in ielts 6.0 minimum....and yes..i think you can apply under sds even after refusal from spp