How to adjust PAC size correctly?

Hi,
I have troubles to settle correctly PAC size. Table 6 in user manual say to put it with 16 for 512 preamble length and with 32 for 1024 preamble length.
table_6|281x266
However, Decawave API say to put 32 for 512 preamble length and 64 for 1024 preamble length


So which value should I set for this both preamble length ?
Thank you for reply.