I quickly opened up Windows 10 to test it myself. I confirm that I can't spend from the P2SH address neither (from Electrum), but I figured out what's going on. Vanity generates a multi-signature redeemScript that is actually consisted of one signer, and it uses the uncompressed private key of that part, which confuses the whole situation even more. I won't go into the technical details, because I noticed Bitcoin Core recent versions don't allow importing non-standard redeemScript, but I'll help you recover your money.

Here are the steps:

• Go to bitaddress.org's repository, and download the source code of the most recent release.
• Grab pointbiz's public key, and verify the signature of changelog. See how to do this here. You might need the Linux terminal for some steps (or some modifications in Windows). If you're wondering why that's necessary, it's to ensure security and authenticity of the files. If you don't think it's needed move on.
• Open up bitaddress locally, go to "Wallet Details", import the private key that starts with 5 and click on "View Details".
• Copy the uncompressed public key. (the one that starts with "04")
• Go to coinbin's repository, and download the source code of the most recent release.
• Verify the sha1sum (again to ensure security).
• Open up coinbin locally.
• "New" -> "Multi-Sig address"
• Remove all public key fields until you're left with one.
• Enter the amount of signatures to release the coin equal to 1.
• Add your uncompressed public key to that one field.
• Click submit, and you'll be given a redeemScript.
• Click on "New" again -> "Transaction"
• Enter your redeemScript.

I believe it's trivial to spend your UTXOs afterwards.