Yitayingwut- Regarding Kevisha- Where is the Taz you quoted? I remember kevisha assuring.
Jothar- I second your comment on the Maareches Hashulchan, although it is useful at times.
If you put cheese on top of pork and fried it, were you over ishul basar bechalav?- No. You are allowed to do that. YD 87:3
2 hours after eating meat you take a piece of milchig candy and make a bracha on it. now what?- I believe we say to lick the candy or take a small bite. (Not sure if you are allowed to swallow)
Sunday in July, at a bris. Somebody is about to have a bagel with cream cheese and lox, and his father says “we don’t do that”. Why?- Based on a possible Taus Sofer brought by Shach and Taz in YD 87:3.