DNS Wide-IP load balancing vs pool load balancing

What topology records have you configured? Have you also tried using the Load Balancing Decision Logs to determine how the BIG-IP DNS system is deciding which pool to select at the wide IP level and then which virtual server to select within that pool? (On the Wide IP, under the Advanced configuration tab, enable all the options for Load Balancing Decision Log. Output should get written to /var/log/gtm.)