Pairs of Multi-Reference InSAR Operator

The docuemntation of this tools states that “pairs could be set to: 06Jan2018-12Apr2018,06Jan2018-09Oct2018,06Jan2018-01Jan2019.”. I used three images to form stack of coregistered pair 20240325 (master ) , 20240301 ( slv1) and 20240406 ( slv2)

I expected the interferogram pairs generated will be

20240325_20240301

20240325_20240426

20240301_20240406

But it generated the first two pair in same order but for thid pair the later date is before the earlier date

i.e 20240406_20240301

For SBAS analysis, we will generally use pair with date1_date2 where date2>date1, But using all parameters to maximum also, it only create three pairs that don’t include 20240406_20240301. Is the pair 20240301_20240406 is same as 20240406_20240301? I will be using such formed pair for SBAS analysis , or should i exclude pairs that has date1>date2, these pairs are only generated as this operator requires this to use internally to generate other pairs?

When that happens, I invert any calculated displacement for that file.