We see such issue before. Usually, such issue was caused by printer driver or images or check settings. Please follow the steps below:

Step 1. Please update your printer driver. It is the most possible reason.

1) Find your current macOS
https://www.halfpricesof...writer/macOS_version.asp 

2) Visit your printer vendor site, download the compatible printer driver for your macOS.


Step 2. Such issue may be caused by image files or check settings. You can verify it by adding a new testing account.

1). Start ezCheckPrinting
2). Add a new account
Click the top menu "Accounts->New Account" to add a new bank account.

3). Enter a simple name like "test 123"

4). Keep the default settings

5). Print a few checks.

If you can print checks with the new account with no problem, please check your image files and check settings.

Please feel free to contact us if you still need assistance.

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When I try to print multiple checks at one time, the printing shifts the wiring and signature up on the checks and makes all the checks incorrect, when I first got the program it worked just fine. When I print singles it works fine but I need to print 100 checks at one time not individually.
Using ezcheckprinting on Mac
Please let me know how I could fix the problem
Thank you