I'm not sure about linking the tickets. I wouldn't imagine so if you are looking at a resort restaurant. Depending on when you are looking for there could be little to no availability for some of the most popular restaurants. Also sometimes MDE has technical issues and won't find anything at all. Have you tried looking under different party sizes?
For example I have just tried 6th Jan 2016 lunch for 4 people in Magic Kingdom and down town Disney area ....no times available so tried dinner.....no times available. OMG if its like that now Ive got no chance of reservations at Easter.
For example I have just tried 6th Jan 2016 lunch for 4 people in Magic Kingdom and down town Disney area ....no times available so tried dinner.....no times available.