This is a QuickBooks unexpected behavior due to possible data corruption, Petergbyrnes.

Let's go ahead and fix it so you can create a memorized transaction already. We'll run the verify/rebuild data utility to detect and fix the damaged data.

Here's how:

1. Click File.
2. Go to Utilities, then choose Verify Data. 
3. If QuickBooks detected no problems, there's no further action needed. If you receive a message, "Your data has lost integrity", the file is damaged. Just continue to Rebuild Data to correct the problem.
4. When you Rebuild Data, you'll receive a message to back up your company file, just click OK. The utility starts as soon as the back up is finished.
5. Click OK when you get the message "Rebuild has completed".
6. Run Verify Data again to check for remaining data damage.

Once done, try to create a memorized transaction.

You can always keep in touch if you need our help. Have a good day!