I think your problem is you need to load your new up to date bouquet, then restart enigma, then follow steps below, what's happening is your bouquet is not recognising 16e because it may be configured for 15.8, as the sats were configured before loading bouquet, so follow steps below after loading bouquet, let me know.
do a manual setup.
1) set up- service searching-tuner configuration
2) Set satellite to 28.2e
2) Configuration mode- set to advanced then lnb left scroll to lnb32
3) Set diseqc mode to 1.2
4) Scroll down and enter latitude and longitude no:
5) select position 1- press ok
6 zap back to tuner config =yes
7 select tuner config again
8) select next sat ie 19 e and set lnb to lnb32
9) the rest should now self populate - press ok
9) repeat steps 6-9 for all sats you wish to locate and dont forget to number each sat , ie 28 no:1 19 no:2 16 no:3 etc
Goto a channel on a tp and manually tune :
Menu
service searching
positioner setup
here you should see channel frequency
search east or west until you tune to signal
use step east or west to gain max signal
go to position number: remembering what you set them to in tuner config: ie 28=1 etc.
now press the green button to save position, exit and zap back yes, then follow on all other sats.
hope this helps