Magento admin grid problem with multiple order selection (Fooman)

Hi. Please read this carefully and only bid if you 100% understand this problem and KNOW EXACTLY how to fix it. I am using Fooman extension for order management in my Mag store, Everything worked OK until another freelancer made some changes (added some additional columns) to the admin grid. At that point I lost some functionality : Previously, using Fooman options, I could go to SALES ORDERS in admin and select PROCESSING (for example) on right side of admin grid, then go to left side and "SELECT ALL" Then I could select from right side drop-down menu "PRINT INVOICES" and would then get a pdf list of ALL processing invoices that could be printed. NOW when I follow steps above I get the pdf open with only the FIRST order in the sequence - not the whole list! Same applies for printing all other documents. Please let me know if you can definitely help to clear this up thank you