Configuring TN 6.5 with SQLServer 2005

I have two 6.5 TN configured to same SQLServer 2005 database . I am experiencing some unpredicatble results in that case . The two TN has been configued to have different enterprises , but when launching I visualise the enterprise fields get mixed with the other TN enterprise fields . I mean the Corporation Name , Contacts etc remains good …but delivery methods gets changed and I can see the same delivery method thats configured with the other TN enterprise profile . These results are more wiered when both the TN’s are accessed simulatneously . Any clues why this happens . I have an apprehension like we can’t have databases shared within two Trading Networks is that correct ?

Please help me !