listbox pics up first row using secound combobox

[cfinch100]

hi
I have a bit of a problem,if I use combobox1 for search say 25------ it picks up the rows perfectly,i have adjusted combobox3 to look at column "n" on same sheet
if I enter say h613 it pics up all these but the top row always inserts "row with MIC in" ,it does not matter what I put in the combobox it always picks this row out first
I can not seem to get rid of it,i have stepped through all1 code but can not see why its doing this,any thoughts please
cheers colin