Hello

We are a family of 4 taking a year off to travel beginning in September.

From Toronto, we intend on flying to London and then we'll hop around Europe and North Africa using a combination of
budget airlines trains and ferries until we get to Egypt.
Then we will embark on the following ITN:

CAI-LHR,(Separate tickets: LHR-DXB & DXB-NBO)
NBO-JNB-HKG-DEL,BOM-BKK,SIN-HKG-PEK,NRT-CNS,SYD-ZQN,
AKL-SCL-GIG,EZE-LIM-CCS-MCO,MIA-PTY,SJO-LAX,SFO-YYZ-LHR-DXB

Please also answer the following questions:

1)I know we have only 19 segments. I am still hoping we can also get to
Fiji. Is it possible? The validator says we can't but the OW timetable says we can. What givies?
2) Assuming Fiji doesn't work out, what would be the best use of the remaining unused flight in my ITN?
3)Can I drop the final flight and just head back home to Toronto?