Straign issue with users

I have some troubles with my wildfire system because I found a straign issue related to the delete contact actions on pandion, I read and this isn’'t asociated to the transport (PyMNSt) and neither with pandion. The useres deleted his contacts on their pandion client, when they start again the system this show again all the deleted contacts. My dude is, Is there any option in wildfire which controle this?, Is trouble of the transport?