Wrong recognition in special cases with high (around 100%) confidence

[merc1305]

Please look at samples and share your ideas what could be done there:

1. 6 like 5, 100% sure https://monosnap.com/file/4odajrhldglESX42YRdwf2QZOf9rvf
2. 9 like 3, 99.8 sure https://monosnap.com/file/HiRWgueqV9NlmACWeIPA1z9n3R4WtB
   and my favorite:
3. dash like 4 with Confidence: 100% https://monosnap.com/file/Y5Ei72hxIK2Jgd6hlFs0KafRAZscrE . Possible to just drop such cases and show something like "nothing found" ?