Question about Outlook Express

I recently moved from my old Windows XP computer using Outlook Express to  new computer with Windows 7 . I downloaded and installed Windows Live Mail 2012 version. I (apparently) successfuly migrated my OE email address book to WLM. I routinely sent group email messages to as many as 30 recipients in OE. When I tried the same group that I had successfully used a few weeks previously in OE with WLM it truncated the list of 32 and sent the message to 14. I did check through the list of 32 to make sure that the transfer had resulted in valid email addresses for all.

 In looking around  at various forums there was some speculation that WLM would allow no more than a group of 12. I therefore set up three new group contacts consisting of 11, 11 and 10 email addresses. When I attempted to send to all three of these new groups simultaneously a message was sent to only 13 with a distribution of 4 from group one, five from group 2 and 4 from group three. Perplexed, I tried sending to only one goup of 11. The message was sent to only 7 of the 11.  I tried another group and it sent to 8 of the 11. Finally, it would only send to 1 of the group of 10.  If I repeat the experiment for any of the three groups WLM seems to choose any old random number ranging from 1 to 8 that it will send from the group of 10 or 11. Given how long I have spent fussing around with this I could have just typed in the individual names (which I have not tried to see if there is a limit there too). But, that would defeat he idea of a group contact wouldn't it? Normal messages sent to 1 or 2 recipients seems to be working ok.

Does anyone have any idea as to what is going on here? Is there a limit to a contact group size with teh 2012 WLM? This really seems like a step backward from XP and OE which never gave he smallest problem with this type of thing.

Thanks for any suggestion you might offer.

Larry