This is an explanation of Bitcoin's compressed and uncompressed versions of address.

https://github.com/OmniLayer/omniwallet/wiki/Converting-between-Compressed-and-Uncompressed-Addresses-and-Private-Keys

The takeaway is: each private key can generate 2 versions of Bitcoin address, compressed and uncompressed. When you stare at a Bitcoin address, you CAN'T tell whether it is compressed or not, so you have to check the balance of both versions for a single private key.

OK, I will tweak the UI, font size, search box etc.

Thanks for the feedback so far...