trying to book LONEX, found a very odd situation, when europe is included the price of ticket almost doubles, can experts advise why this is happening.

2 different LONE given with tax break up. below.

jnb-hkg-del-tyo-hnl-lax-CHI-las-dca-SLC-MIA-LIM-SCL-EZE-GRU-JNB
tax cost 8360 ZAR

2nd JNB-MAD-HEL-DXB-SYD-AKL-HKG-CMB-TYO-LAS-MIA-LIM-SCL-BUE-SAO-JNB,
TAX COST 28,000 zar

MAINLY due to MULTIPLE CARRIERE SURCHAGE 5000 ZAR, AND CARRIER SURCHAGE 14000 ZAR, CAN somebody help in understanding the difference,
i prefer the 2nd on so i can break the RTW twice in between so i can space out over 1 year ....

is this because there are 7 carriers in 2nd LONE where as only 4 in first does this affect pricing?