When Enterprise Vault is deciding which files to archive it applies the archiving rules in the order you list here, beginning at the top. When it finds a rule that applies to a particular file it applies that rule and then moves on to the next file; it never applies more than one rule to a file. It can be important that you put the rules into the correct order because, when it has found a rule that applies to the file, Enterprise Vault does not search any further.
In this case, *.htm files are never archived because Enterprise Vault applies the first rule and then does not look at other rules.
When you have finished defining the rules, click to continue.