This issue is a known issue here:
> meteor create example
> cd example
=> Started proxy.
=> Started MongoDB.
Error: Extracted archive '/C/Users/Pj/AppData/Local/Temp/.tmpkxwy69' should only
contain one entry
I think you need to add one package at a time and see where it breaks. I know it's tedious, but you need to find the problem somehow :)
To save some time, you can use a technique called binary chop (or binary search). Add half of the packages, if it's good, the problem is in the second half of the list. Keep chopping until you find it.