I recently signed up for Chinesepod and have been adding my vocab to Skritter automatically. However my list seems to have blocked at 100 items, no matter how many times I press the update button. How can I get around this problem? Will I have to tag words by sets of 100 or create lists on Skritter manually?

skritter stops adding new words when you still have to review the existing pile.
that might be the reason for not adding in your case.

The API only fetches the first 100, for efficiency and simplicity. I'll add it to my list to fix this, but in the meanwhile the only way to get the tagged lists to work is to break them down into multiple tags.