Just recently I got to Itani +999 doing bulk procurement missions, then for some reason I stopped getting any more standing points for Itani missions. I also have +997 Xang Xi but am not getting any standing points for them now either, so I tried an Ineubis mission (I am +970) and I did get standing for that one.

Any ideas?

Thanks for the info Rogue, I didn't think to check General.

However, I did as suggested, got down to +988, took a 10 jump bulk procurement mission with a 2:20 timer, completed the mission with an hour to spare, got +20000 trade points and my Itani standing was increased noticeably, back up to +999 :(