Two NRF24L01 Transmitters sending temperatures to one Receiving Unit

I have two devices transmitting temperature to one receiver. Right now only one at a time will work displaying the proper temperature. This verifies that the hardware on each transmitter is working and Serv1 & Serv2 are properly set up.

In the code:
Mirf.getData((byte *) &temp1); //small board
//Mirf.getData((byte *) &temp2); //large board

When either Mirf.getData((byte *) &temp1); or just Mirf.getData((byte *) &temp2); is used I can see the correct temperature of each of the two transmitters.

when both lines are not commented out I can see that one temperature is correct but the other reads a constant wrong temperature.

I’m no good at code as you can tell so any help would be great.

#include <MirfHardwareSpiDriver.h>
int16_t h = 64;
int16_t w = 128;
// OLED I2C bus address
#define OLED_address  0x3c
Adafruit_SSD1306 display(OLED_RESET);
float temp1;  //int
float temp2;
void setup()
  Mirf.cePin = 8;
  Mirf.csnPin = 9;
  display.begin(SSD1306_SWITCHCAPVCC, 0x3c);  // initialize with the I2C addr 0x3D (for the 128x64)
  display.clearDisplay();   // clears the screen and buffer 
  Mirf.spi = &MirfHardwareSpi;
  Mirf.setRADDR((byte *)"serv1");   //has to be serv1 !
  Mirf.setRADDR((byte *)"serv2"); //has to be serv2 !
  Mirf.payload = sizeof(temp1); 
  Mirf.payload = sizeof(temp2);
void loop()
  //Can only use one at a time or gives an error one on Serv2
  Mirf.getData((byte *) &temp1);  //small board
  //Mirf.getData((byte *) &temp2);  //large board
  display.print("Small Brd:");
  display.setCursor(70,10);  //over,up
  display.print("Large Brd:");
  display.setCursor(70,40);  //over,up

See page 39-41 of the nrf24L01+ product spec for multiceiver. Not sure you code for that.

7.6 MultiCeiver™ MultiCeiver™ is a feature used in RX mode that contains a set of six parallel data pipes with unique addresses. A data pipe is a logical channel in the physical RF channel. Each data pipe has its own physical address (data pipe address) decoding in the nRF24L01+.