Thanks for the clear explanation.
I tried what you have suggested and the behavior is the same. The RX skips values as pasted below. The numbers should be indexing by 1 every iteration/line printed.
RF24/examples/GettingStarted
radioNumber = 1
*** PRESS 'T' to begin transmitting to the other node
payload size: 1
Received 1 bytes on pipe 1: Binary rep: 0 -: 0
Received 1 bytes on pipe 1: Binary rep: 1 -: 1
Received 1 bytes on pipe 1: Binary rep: 11 -: 3
Received 1 bytes on pipe 1: Binary rep: 11 -: 3
Received 1 bytes on pipe 1: Binary rep: 110 -: 6
Received 1 bytes on pipe 1: Binary rep: 111 -: 7
Received 1 bytes on pipe 1: Binary rep: 111 -: 7
Received 1 bytes on pipe 1: Binary rep: 111 -: 7
Received 1 bytes on pipe 1: Binary rep: 1100 -: 12
Received 1 bytes on pipe 1: Binary rep: 1101 -: 13
Received 1 bytes on pipe 1: Binary rep: 1111 -: 15