EWQLSO Gold Quirks

I've just started using this library but am getting disappointed a lot by things not being quite right.
I altered a couple of works in progress by changing from Notion instruments to EWQLSO instruments and immediately noticed things which played back fine before now playing back incorrectly. For example, in the cello part of a string quartet I have some tied whole notes which should sound over 4 bars and it only sounds for 2 bars. I checked the length of the sound involved against playing the sample on a keyboard and it plays back the full length of the sample but that length is insufficient because it's being used in a slow passage. Changing the staff back to a Notion sound restores the correct playback as does employing a GPO sound. This is extremely annoying as the EWQLSO cello is the best I now own but I can't use it like this.
Does an experienced EWQLSO user know if there are errors within the rules?
I altered a couple of works in progress by changing from Notion instruments to EWQLSO instruments and immediately noticed things which played back fine before now playing back incorrectly. For example, in the cello part of a string quartet I have some tied whole notes which should sound over 4 bars and it only sounds for 2 bars. I checked the length of the sound involved against playing the sample on a keyboard and it plays back the full length of the sample but that length is insufficient because it's being used in a slow passage. Changing the staff back to a Notion sound restores the correct playback as does employing a GPO sound. This is extremely annoying as the EWQLSO cello is the best I now own but I can't use it like this.
Does an experienced EWQLSO user know if there are errors within the rules?