Named Structure maker... limitations?

2 things i would like to be able to do with named structure make that i dont seem to be able to make happen. can someone let me know if perhaps im just doing something wrong and it can be done or in fact im trying to make it do the impossible.

1. Combine multiple named structures using structure combine. ie. add structures 1 + 2 , add structures 3 + 4 , and then add the resulting two structue. QC crashes when i attempt this, i have made sure there are not conflicts in the named structures.

2. Use math to name the indexes on names structure. so start with a number and then add one all the way down. this would save a lot of time but it wont take the number result from math and use it as a string, which it seems to be after for the input key.

thanks :)