I have configured a bunch of rules in the URL monitoring, but I can't prioritize these rules with the up/down buttons :
Is there a workaround ?
It appears that all of the URL's you have defined are regular expressions. There is a filter drop down button in the top right (next to the "All" text) - if you select 'URL as regular expression' from that drop down, you should be able to reorder the entries as you see fit. If you have multiple types of URL's defined, there is also an 'Edit as text' button, which shows the raw XML used to define the URL's. You can manually cut and paste a URL within this window to change the order.