return multiple values based on a repeating number, Index and Match?

If you look at the attached spread sheet i need to make a formula that will look at 1 column for a number and return the 1st column value to the right and the 2nd column value to the right. or just the first one and i can figure out how to make it return the 2nd column.
So far i did this on my main excel book which i didnt upload. i uploaded a simpler version.
=IF(ISERROR(INDEX($A$3:$B$788,SMALL(IF($A$3:$A$788=$K$2, ROW($A$3:$A$788)),ROW(1:1)),2)),"",INDEX($A$3:$B$788,SMALL(IF($A$3:$A$788=$K$2, ROW($A$3:$A$788)),ROW(1:1)),2))
But it screws up some times by returning values that are not part of my original number "K2" i am looking up.

=IFERROR(INDEX(B$2:B$5, AGGREGATE(15,6, (ROW($B$2:$B$5)-ROW($B$2)+1)/($A$2:$A$5=$E$2),ROWS($F$2:$F2))),"") worked great!
Thanks a bunch,
Now how about this one.
Lets say i want to return the value in column G if it is in the month of October and if there are multiple values for October i need them added up. So on this one it would add up to 22500 since there is only one entry for October.