... I just took a look at the first .mis of you Eagle Squadron campaign, and since you asked for a piece of advice ...
You just can't have:
Fuel 100, for an airplane that is already flying (NORMFLY), especially an heavily loaded bomber, since take off is what costs the more, fuel wise ...
[g0100]
Planes 4
Skill 1
Class air.JU_87B2
Fuel 100 weapons 1xSC250_4xSC50
[g0100_Way]
NORMFLY 235355.13 203617.04 4000.00 300.00 &0
NORMFLY 196944.04 224074.78 4000.00 300.00 &0
NORMFLY 181608.94 225376.33 4000.00 300.00 &0
NORMFLY 168969.38 222107.25 4000.00 300.00 &0
GATTACK 162270.40 218659.63 4000.00 300.00 4_Chief 0 &0
NORMFLY 144943.71 209486.67 4000.00 300.00 &0
NORMFLY 142032.92 194896.01 4000.00 300.00 &0
NORMFLY 194885.35 180220.58 4000.00 300.00 &0
LANDING 259958.95 215802.86 0 0 &0
... you can only have Fuel 100 if the first waypoint of a plane is : TAKEOFF ...