Interesting moments on the account record

i have noticed that there seems to be a limit as to how many interesting moments show on the account record in SFDC. for example i have an account with interesting moments going back to March 2013 on the individual contact records but on the Account record only ones back to last month are showing.

does someont know what limit is on account level or is this a glitch

it really is a problem as we like to see when an account first engaged and we can't. we are having to go to each contact and find their first engagement with us. very tedious if there are 65-100 contacts to look through.

thanks,
trish