Once you use /tokenize you can't undo it. You can use token identifiers without having to /tokenize. Either that or store $1- (the text in the event) to a %variable and then retokenize it (/tokenize 32 %variable)

I have a question about your code though. What is in a sample line in your ignorelist.db file? You $read the line. Then use tokenize 32 on $gettok(line,1,32). Isn't that kind of redundant?

I suggest you convert your ignorelist.db to a hash table. You can
/hadd -m ignorelist <mask> <any xtra data>
and then use:
if ($hfind(ignorelist,$fulladdress,1, W)) { halt }