Hi SArepairman, :-)
The extra 130 Ohm and 68 Ohm on the outside of the LT1028 is to make the offset controle range smaller.
There is a deliberate imbalance between pin 1 and 8, the LTC1151 corrected this imbalance by looking at the voltage difference between the inputs of the LT1028.
Because you use 1300 and 680 Ohm, there is a smaler controle range for the opamp.
If you lower the 30K to 10K you wil get a bigger controle range, but also there is a change that the chopper frequentie wil be at the output of the LT1028.
You inject more and more noise out of the chopper opamp in to the LT1028 if you make the controle rage bigger.
I hope if you use a LTC1151 you connected the "spare" the wright way? output to - and + to ground?
OK,
If you use the LTC1151, remove the zeners from it's powersupply.
If you have a scope, use a probe to measure the DC level on the output of the LTC1151 (pin-7 or 1)
Optimum is the scoop line near the center of the screen (bottom is say -15V and top of the screen is +15V)
The scoop line wil move if you move above the circuit :-)
This level of measurements @ uV levels is a bitch :-)
Light, draft, moving measuring cables, mechanical stress all make you crazy

You have to screen the circuit to make good measurements.
Change the 130 and 68 Ohm resistor so that the scope line stay's reasonable in the middle of the oscilloscope.
Maybe you need a 130 and a 100 Ohm resistor...
The trick is to find out how big the controle range must be for your circuit.
If you make the rage to big than there wil be some chopper noise on the output of the LT1028.
The output of the chopper opamp must not be near the powersupply voltage!
Be aware that the pins 1 and 8 are verry sensitive, see them as to extra inputs of the opamp, ofcourse with a lower gain than pin 2 and 3.
Ih hope this helps.
Kind regarts,
Blackdog