Can someone please elaborate on "adjacent seeds" and what exactly are the means to go about getting them?
In the time finder, when you have the list of seeds, rightclick the seed you are trying to hit and "Generate adjacent seeds (Current frame)". You will get a list of the 9 adjecent frames, which are within a second from the seed you are trying to hit, have a nearby timer0, or both. Comparing the IV's of the pokemon you caught will help you determine what seed you've hit.
For example:
Seed 1a - Time: 09:59:59 - Timer0: C7E
Seed 2a - Time: 10:00:00 - Timer0: C7E
Seed 3a - Time: 10:00:01 - Timer0: C7E
Seed 1b - Time: 09:59:59 - Timer0: C7F
Seed 2b - Time: 10:00:00 - Timer0: C7F
Seed 3b - Time: 10:00:01 - Timer0: C7F
Seed 1c - Time: 09:59:59 - Timer0: C80
Seed 2c - Time: 10:00:00 - Timer0: C80
Seed 3c - Time: 10:00:01 - Timer0: C80
Imagine you are trying to hit seed 2b (because it has a flawless spread). When you catch a pokemon and it's IV's match seed 1b you know you were a second too early. When you catch a pokemon and it's IV's match seed 2c you know you hit your seed but your timer0 was off, so you just have to try again.