Last version of MinePeon @ GitHub doesn't have graphics? I tried to modify 'Graph points' followed by 'Save settings', but it keeps giving no graphics. I did loved the old version, with Advanced option. 
In both RPI's, Uptime 13h 59s 52s
What OS/browser are you using? In both RPI's, Uptime 13h 59s 52sDo you mind sending me /var/log/httpd/error.log?
Is there any error in your browser console?
On the github version:
Graphs, maybe highcharts is not compatible, that would be no fun. I'm adding the normal graphs now.
Pools, there are two new files created: miner.pools.json and miner.options.json, these are perfectly compatible with angular. These files are loaded in the miner section. When saved, these files change AND get merged into a cgminer compatible miner.conf So check if those files exist and mod (660) and if /opt/minepeon/etc is mod (770)