Hi,
Those amount of orphans are unusual(except when there is a large amount of hash power being switched on(in which case it is by design)).
Have you synchronized your pool's system time with NTP?
GoldCoin (GLD) is very sensitive to system time for mining. That could be the reason why your blocks are being rejected.
You can take a look at HashFaster's block find page for the explanation:
http://gld.hashfaster.com/index.php?page=statistics&action=blocksAs you can see from Last 7 days stat:
923 blocks were found 826 valid 97 orphan
Subtract the last 24 hours stat:
202 blocks were found 139 valid 63 orphan
and we are left with:
721 blocks were found 687 valid 34 orphan
This shows normal GLD operation(4.9% orphan rate) over the last 6 days before 24 hours ago..
The last 24 hours show a lot of orphans because there has been a hash rate spike, the client is designed to orphan blocks when this happens.
It is perfectly normal behavior for the last 24 hours.