OK. Inside webMAN is showing 397 total ISOs. 217 PS2, 160 PSone and 20 PSP. In XMB 129 PS2, 66 PSone and 20 PSP. I have refreshed both XML/HTML and changed plugin memory usage to MAX (1280KB) and then save and rebooted. I am attaching some pics as requested to try and help give you an idea of what everything looks like. Thank for your help and advice.
Thank you for the pictures and the extra details. I think that your issue is in the following steps:
"I have refreshed both XML/HTML and changed plugin memory usage to MAX (1280KB) and then save and rebooted."
The correct order of the steps should be:
"I changed plugin memory usage to MAX (1280KB) and then save and rebooted. Then I refreshed both XML/HTML and rebooted again."
I simulated your scenario with 300 PS2 ISO and setting the memory usage to "Max (1280KB)"
As you can see, it doesn't show all the 300 isos, but it shows 285 isos which is more than 129 and your total 217 ps2 isos.
It shows 285 ps2 games because only 128KB is allocated for the PS2 group. Part of the memory is used in the index and XML code. Also the length of the file names affect the total number of games.
EDIT:
If there is not enough free memory available, webMAN will auto-reduce the memory usage selecting the min+ or min profiles.