Not all my links in collections are saving

I'm trying to use the collections feature and it works really well for the most part (really helps me declutter my tabs while doing research at work) but im noticing that sometimes I get an error where I try to save around 30 tabs at once and it only seems to be able to save a little over half. Is there a limit of how many tabs im allowed to save at once?

There is no limit on the number of tabs in a collection. You should be able to save all the tabs from a window. 

There is one exception though. Every browser has some special URLs that it does not allow to save. For example Firefox does not allow us to save pages from domain. And Chrome does the same for domain. If some of your tabs have pages from these and similar domains they will be skipped. 

You can find more information in WebSatchel's documentation page