Is it common to have more than one of the same IC chips (KA3525) in the same circuit?

I have a simple 300watt DC to AC inverter that utilizes a KA3525 PWM IC, a KA324 OP Amp and another IC that has the face scratched off but in the schematic it seems to have the same connections as the KA3525.

I guess all I'm asking is if this seems common or unusual to have two of the same PWM controllers in a DC to AC inverter circuit

Thanks

 

Maybe.
How about posting the circuit diagram?

 

the other one could be for an aux supply (?)

 

I've seen 12V DC to 230V AC inverters with 5 push-pull stages running in parallel stepping 12V up to 325V DC bus.

 

Sure. I use two MC33932VW chips for four bridges to generate 3-phase 400Hz four-wire outputs on a low power instrument inverter using a PIC32MK controller.

https://www.mouser.com/datasheet/2/302/MC33932-1152165.pdf