i need unix shell script to pull data from alert and listener log files from numerous oracle databases then cat them to emailed to a group

This expect script is suppose to connect to SERVER DB01 that hosts two databases and pull the alert and listener log files sizes. 1. The problem i am having is that the correct alert log/size file is pulled for both databases but the wrong listener log/size is pulled for testdb2...because in the output (below) the sid is set to testdb1 instead of testdb2. 2. I need help in directing the script ot set the correct sid and to pull from the correct path for testdb2. 3. I will also like the output to be in MB because i only want to print out the log files larger that 500MB and mail them out every day , then every friday i mail out the complete output. details are attached