Hopefully, your browser can translate over my answer for you.
I believe this would be the nature of using a text field sadly which likely is going to sort by alpha/numeric options. Today HubSpot doesn't have a specific % option so what I bet is happening you are seeing items such as...
1%
18%
19%
2%
I believe the only way to correctly get items to sort would be to use a number field. However, this won't be able to contain a % symbol. I think I have seen this request on the HubSpot ideas forums as a suggestion.
Hopefully, your browser can translate over my answer for you.
I believe this would be the nature of using a text field sadly which likely is going to sort by alpha/numeric options. Today HubSpot doesn't have a specific % option so what I bet is happening you are seeing items such as...
1%
18%
19%
2%
I believe the only way to correctly get items to sort would be to use a number field. However, this won't be able to contain a % symbol. I think I have seen this request on the HubSpot ideas forums as a suggestion.